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I. In which Kaeya gets dramatic, Albedo is oblivious, and Teyvat simply isn't ready
It starts—as most catastrophes do—with Kaeya barging into someone else’s laboratory without knocking, armed with three things: a half-finished bottle of dandelion wine, a bouquet of crushed cecelias he definitely did not pick himself, and the sort of grin that belongs in both a flirtation and a felony.
“Albedo, my snowflake, I’ve come to pollinate your intellect.”
Albedo, elbow-deep in something that is either acidic or deeply illegal, does not look up.
“I am working.”
“Exactly,” Kaeya says, as though that explains anything. “And I’m here to be a charming distraction.”
Albedo sighs. It is a very long sigh. A sigh that has lived through wars and thesis deadlines. “Did Jean send you?”
“Jean never sends me anywhere. I simply appear and make her regret all her life choices.”
“That sounds accurate,” Albedo mutters.
But Kaeya is undeterred, which is to say: Kaeya is Kaeya. He sidles in with the kind of swagger that shouldn’t legally exist at eleven in the morning. He sets the wine down on a stack of research notes, ignores the way Albedo stiffens at the threat of a wine-stained disaster, and presents the bouquet like a weapon.
“For you,” he says, in a tone that suggests he believes himself to be a gift more valuable than any floral arrangement. “To brighten your already radiant presence, oh frozen blossom of my heart.”
Albedo looks at the crushed cecelias. One of them appears to be crawling with a beetle.
“That one’s still alive,” he says, mildly.
“I thought you liked life in all its forms,” Kaeya replies, with a wink so exaggerated it probably violates the laws of eye socket anatomy.
Albedo stares at him. “You are not being particularly helpful.”
“Not trying to be, darling.”
It’s the darling that does it.
Not because Albedo notices. Oh no. He continues tinkering with the alchemical apparatus before him like Kaeya didn’t just drop a term of endearment soaked in innuendo into the air like a chemical weapon.
But something in Kaeya still freezes—like a man who stumbled into saying something genuine while aiming for something theatrical.
Because he meant it.
The darling wasn’t part of the act.
Not fully, anyway.
And now Albedo is eyeing him in that way of his—cool, analytical, mildly curious, like Kaeya is a butterfly pinned to a tray instead of a fully grown man suddenly questioning his life choices.
“You’re flushed,” Albedo says, tilting his head. “Are you unwell? Feverish? Did you walk through the snow again with your shirt unbuttoned?”
Kaeya absolutely did, because Kaeya believes shirts are guidelines, not laws.
“No fever,” he replies. “Just overwhelmed by your beauty.”
Albedo frowns. “Do you want to sit down?”
Kaeya laughs. Too loud. “Oh, sweetheart, if I sit down, I might not get back up.”
Another endearment. It slips out like second nature, and again, it’s not the flirt that makes him pause. It’s the way his stomach flips after it leaves his mouth, like he meant it again.
Albedo, entirely unfazed, gestures to the stool next to him. “Then sit. But be quiet. This reaction is time-sensitive.”
Kaeya sits. Quietly.
Which is terrifying in its own right.
He stays there for forty minutes.
Forty minutes of not flirting, not interrupting, not dramatically lounging over the lab table like a cat in heat.
Forty minutes of watching Albedo’s precise hands work with vials and powders, of the tiny furrow between his brows when he concentrates, of the occasional way he murmurs to himself under his breath like the world is a math problem he’s almost solved.
Kaeya has seen many people in battle, in love, in desperation. But none of it compares to Albedo in a state of quiet discovery—fierce, focused, alight with purpose. Beautiful in the way glaciers are beautiful: cold, ancient, and entirely capable of swallowing you whole.
And that’s the moment Kaeya realizes he is completely, tragically, fucked.
He is in love with Albedo.
Utterly, inconveniently, stupidly in love with the man who just told him to be quiet and has not even glanced at the bouquet since he dropped it.
Later—after the experiment is complete and Albedo has finally acknowledged Kaeya’s presence with a halfhearted, “You’re still here?”—Kaeya walks out into the snow, alone, fingers in his pockets, heart in disarray.
Diluc, who has unfortunately chosen this exact moment to pass by on his way to the Adventurer’s Guild, takes one look at Kaeya’s expression and says, “Gods, not you too.”
Kaeya blinks. “Pardon?”
“You’ve got the look,” Diluc mutters. “The sad, pathetic one. Like a cat who tried to court a fireplace.”
“I don’t—”
“You’re in love,” Diluc says flatly. “With the alchemist. Aren’t you?”
Kaeya tries to deny it. But his brain chooses that exact moment to replay sweetheart and darling and the way Albedo licked something off his thumb during the experiment like it wasn’t illegal to be that unintentionally devastating.
He groans.
“I’ll take that as a yes,” Diluc says. “Congratulations. You’ve fallen for the most emotionally constipated man in Mondstadt.”
“Rude,” Kaeya mutters. “And accurate.”
“You’re doomed.”
Kaeya kicks a snowdrift. “Tell me something I don’t know.”
Albedo, back in the lab, finds the bouquet of half-dead cecelias and sets it beside a beaker like a half-hearted shrine. He does not remember receiving them. He does, however, find a single dark blue feather left behind on his stool.
He frowns at it.
Something about the feather seems… personal. Familiar.
For a moment, he considers the possible romantic implications.
Then he shakes his head.
“No,” he mutters to himself. “That’s not how Kaeya operates.”
He tucks the feather into a drawer and returns to his notes.
II. In which Kaeya tries to be subtle, Albedo almost invents thermonuclear flirtation, and Mona has a terrible day
It begins, like most of Kaeya’s choices, with absolutely no planning and far too much wine. Or rather: too much brooding about wine, alone in Angel’s Share with his cheek pressed to the rim of a half-drained glass, muttering “sweetheart” under his breath like it’s a prayer he shouldn’t be saying.
Kaeya is sulking. He is, in fact, in the rare, dangerous state of romantic sulking.
Because it turns out Albedo did not react to darling, or sweetheart, or the flowers. Or the feather. Or the lingering glances. Or the time Kaeya casually leaned over his shoulder and whispered “I could get used to this view” while Albedo adjusted a microscope.
Nothing.
Nothing.
Albedo had merely blinked once, offered him a pipette, and said, “Hold this for me.”
Tragic.
Utterly tragic.
And now Kaeya is determined to take a new approach.
A subtle approach.
A sophisticated one.
He decides this at exactly 11:42 p.m., after Diluc tells him to “get out before you start weeping into the carpet,” and before he drunkenly asks Lisa:
“How do you say ‘I am madly in love with an emotionally stunted winter prince of chalk and chaos’ in alchemical terms”
She replies,
“Try not saying it at all.”
---
The next morning, Kaeya arrives at Dragonspine armed with two things:
A steaming thermos of bitter black tea (which he claims is for Albedo, but mostly he’s just trying to bribe him into keeping Kaeya’s fingers from freezing off).
An absurd, flower-drenched, ribbon-wrapped note tucked into the inner lining of his coat that says, in calligraphy he definitely coerced Venti into doing:
To my radiant sunbeam, my favorite volatile reagent.
You make even Dragonspine feel warm. Yours, etcetera.
(P.S. your eyelashes are a national treasure)
It’s folded into the shape of a snowflake. It took him two hours.
He plans to drop it casually. Leave it on a desk. Maybe under a flask. Slide it across the table with a smirk and a line like “oops, must’ve spilled my affection again.”
But when he reaches the camp, what he finds is… chaos.
Literal chaos.
Mona is standing outside, yelling.
Albedo is standing inside, also yelling.
There is an alarming amount of glitter.
“Kaeya,” Mona says, the moment she sees him. “Thank the stars. You—you need to talk to your boyfriend.”
“Not my boyfriend,” Kaeya says automatically, before doing a double take. “Wait, wait, what happened?”
“He—he tried to alchemically duplicate sunlight.” Mona points at the lab, which is glowing. There’s a low hum, like the mountains are trying to harmonize with themselves. “He called it an experiment in radiant diffusion theory. I call it a violation of several universal laws of safety and good taste.”
Kaeya turns to Albedo, who is covered in what looks like golden powder and has glitter in his hair like someone hit him with a radiant bomb. He is holding what can only be described as a glowing sunflower with a core of condensed pyro energy. He looks… proud.
“I see your definition of ‘subtle’ is still unrecognizably big,” Kaeya says.
“I am proving a theory,” Albedo replies primly, as though proving a theory makes it okay to nearly level a mountainside.
Kaeya grins. It’s automatic. Painful. Tender.
“Well then, sunshine,” he murmurs, stepping closer. “You’re glowing.”
Sunshine.
Albedo does not flinch.
He looks up from the flower and says, quite seriously, “Yes. That’s the point.”
Kaeya wants to scream.
Instead, he sighs, reaches out, and gently plucks a piece of crystallized pyro off Albedo’s collar. His fingers brush fabric—then skin. Albedo doesn’t move.
“I brought you tea,” Kaeya says instead, like an idiot. “Black. No sugar. I figured that’s the kind of thing you’d like. Severe. Unforgiving.”
Mona, from behind them: “I am literally still here.”
“Ignore her,” Kaeya stage-whispers. “She’s part of the glitter fallout.”
“I can hear you,” Mona mutters, storming off toward the snow with a disgruntled wave of her cloak. “If I get blown up, I’m writing both of you into my star charts as harbingers of emotional doom.”
Kaeya laughs.
Albedo does not.
He’s looking at the tea. Not drinking it. Just… watching the steam curl.
“I was not expecting you,” Albedo says finally, still too calm.
“I rarely make appointments,” Kaeya says. “It ruins the mystique.”
There’s silence. The good kind, Kaeya thinks—almost intimate. Almost something. Almost warm, even here in the freezing belly of the mountain.
Albedo finally sets the flower down. The lab dims a little. Not quite dark, not quite safe.
And then, to Kaeya’s astonishment, he says:
“Do you think I’m... radiant?”
Kaeya blinks.
“I—what?”
Albedo doesn’t look up. “You said I was glowing. Like sunlight.”
Kaeya opens his mouth.
Closes it.
Opens it again.
His brain has left the building. He is now operating on instinct and spite.
“I think you’re dangerous,” he says, voice low. “Brilliant. Breathtaking. A walking chemical hazard wrapped in beauty. And yes, radiant, if you must know. But mostly—” He leans in, eyes on Albedo’s mouth. “—mostly I think you’re the kind of phenomenon that destroys things and calls it discovery.”
Albedo finally looks at him.
Kaeya’s heart stutters.
Then, after a long pause:
“Oh,” Albedo says softly. “Interesting.”
Kaeya is suffering.
“I—what does that mean?”
“It means,” Albedo says, like he’s talking to a confused student, “that I hadn’t considered that before. Thank you.”
And then he turns back to the sunflower and starts taking notes.
Kaeya watches him, stunned. Betrayed. Possibly on the verge of a religious awakening or breakdown.
He sits in the corner. He sips his own tea.
It’s cold now. Bitter.
Somewhere in his coat pocket, the stupid snowflake note is burning a hole in the lining. He doesn’t take it out.
He’s starting to think sunshine was too subtle after all.
That night, Kaeya walks home through the snow and wonders if he should just get a chalkboard and write it out:
I am in love with you. I think about your hands when I can’t sleep. I would risk hypothermia for your smile. Also, please let me kiss you. Please. Please.
He tells Venti this the next day.
Venti is delighted. “You should absolutely write that down! It could be a ballad. A plea. A deeply erotic piece of spoken word. I’ll add music!”
Kaeya nearly strangles him with his own lyre.
Meanwhile, Albedo, back at the lab, lifts the thermos Kaeya brought him and finally takes a sip.
It’s cold, but oddly sweet.
He blinks once, turns the cup in his hands, and murmurs under his breath:
“…Radiant…”
He doesn’t smile.
But he doesn’t throw the flower away, either.
He keeps it on his desk. It never quite stops glowing.
III. In which Kaeya almost dies of yearning, Albedo weaponizes precision, and Sucrose regrets ever asking
To Kaeya’s mild horror and quiet delight, it becomes a routine.
He shows up. Albedo pretends not to notice. Kaeya flirts. Albedo ignores him in increasingly specific ways. Kaeya leaves with a migraine and the need to scream into a snowbank.
It’s perfect. It’s torture. It’s Albedo-shaped suffering, and Kaeya can’t get enough.
This time, it begins with a failed experiment, three broken vials, a minor explosion, and one (1) very distressed Sucrose running through the hallways of the Knights of Favonius headquarters shouting, “There’s a situation with the chalk prince and a slime core—!!”
Kaeya drops everything.
Literally everything.
A report. A dagger. A very expensive apple.
He sprints toward the alchemy labs, coat flaring like he’s auditioning for a romantic tragedy. Which, in fairness, he is.
He finds the lab hazy with smoke and glitter (again), Albedo coughing politely into one gloved fist while several scorch marks bloom like celestial bodies across the wall. The chalk prince looks approximately 13% ruffled, which, for him, is like being actively on fire.
“Albedo—” Kaeya breathes, pushing through the fumes like a concerned husband in a third-rate play. “Are you hurt?”
“I’m fine,” Albedo says.
Which would be reassuring, except that his hair is half-singed and his left sleeve is on fire.
Kaeya douses him without hesitation, flinging his entire coat over Albedo’s arm like a knight shielding a noble from a rain of arrows. It’s excessive. It’s dramatic. It’s entirely unnecessary.
And Albedo doesn’t even flinch.
He blinks slowly. “That was not urgent,” he says. “The fire was localized.”
Kaeya groans. “You were on fire.”
“Only partially.”
“You were—on fire, Albedo.”
“A controllable percentage,” Albedo replies. “Statistically insignificant.”
Kaeya wants to lie down on the floor and reevaluate his entire romantic strategy.
Instead, he pulls his coat off Albedo’s arm, flaps it out once, and says, “Well, next time let me know if you plan on combusting so I can bring marshmallows.”
There is a pause.
A beat.
And then Kaeya says it.
“Well, starlight, do I have to follow you everywhere to keep you from dying, or will you just agree to let me bodyguard you full-time?”
He delivers it with a smirk. The kind of lazy, dangerous smirk that’s gotten him into trouble in most corners of Teyvat.
Albedo stares.
Kaeya waits.
Albedo tilts his head like he’s observing a strange chemical reaction.
“...Starlight?” he echoes, at last.
Kaeya freezes.
Shit.
Shit. Shit. Shit.
“It’s a—term of endearment,” Kaeya says lightly, waving a hand like it’s just a joke. “You know. Nickname. A sweet noth—”
“I see,” Albedo says.
A pause.
Kaeya stares at him.
“Do you dislike it?” he asks, because apparently he wants to be emotionally flayed alive today.
Albedo looks down at his gloved fingers. He rubs two together, smudging some leftover charcoal between them. He doesn’t meet Kaeya’s gaze.
“No,” he says, softly. “I don’t dislike it.”
Kaeya forgets how to breathe for a full five seconds.
Sucrose comes in ten seconds too late and immediately walks back out, mumbling something about “atmosphere density.”
Kaeya spends the rest of the day hovering like an emotionally repressed specter while Albedo continues working like nothing happened — except for the fact that every time Kaeya calls him Albedo, Chief Alchemist, or Starshine Incarnate (the last one was admittedly a stretch), Albedo pauses.
Just slightly.
Just for a fraction of a second.
But Kaeya notices. Oh, he notices.
And worse: Albedo doesn’t correct him.
Not once.
Later, after Kaeya’s gone—after a prolonged goodbye in which Kaeya looked very intently at Albedo’s mouth and Albedo simply said “good night” like he wasn’t casually shattering Kaeya’s entire will to live—Sucrose approaches the lab door cautiously.
She finds Albedo staring at one of the burn marks on the wall like it personally offended him.
“…Sir?” she says, gentle. “Are you all right?”
Albedo hums.
He doesn’t look at her.
“Do you think it’s…common,” he says slowly, “for someone to refer to a colleague as starlight?”
Sucrose immediately short-circuits.
“Um,” she says. “N-not… unless you’re… courting? I think?”
“Courting,” Albedo repeats. The syllables land oddly in his mouth, like a language he never expected to speak.
Sucrose tries not to panic.
“I mean! I-I don’t know! Maybe it’s just a poetic thing. Maybe he calls everyone that? Or… maybe just you?”
Albedo goes quiet.
“…He has also called me ‘darling’ and ‘sweetheart,’” he murmurs.
Sucrose blacks out.
Meanwhile, Kaeya lies facedown on his couch, shirtless, rereading the last three conversations in his head and groaning like a man haunted by ghosts of his own making.
Rosaria throws a pillow at him.
“You’re in love with a science project.”
Kaeya flips over and stares at the ceiling like it’s a crucifix.
“He lets me call him starlight.”
Rosaria lights a cigarette indoors just to spite him.
“You’re doomed,” she says.
“I know,” Kaeya whispers.
IV. In which Kaeya flirts with tactical precision, Albedo stares like he’s solving the equation of love, and Mondstadt becomes very aware that something is going on.)
There’s a problem.
The problem is that Albedo is staring.
Staring in the way astronomers stare at stars just before they name them after gods or tragedies.
Kaeya is standing in the courtyard of the Knights of Favonius headquarters, midway through a very dramatic recounting of a hilichurl ambush (which may or may not have been embellished with fire, betrayal, and at least one shirtless duel), when he looks up and finds Albedo leaning against a stone column, arms crossed, eyes narrow.
The world slows.
Time distorts.
Kaeya, mid-gesture, chokes on his words and says, “...and then I—ah. Hello, sweetheart.”
The crowd goes silent.
Another endearment.
He said it publicly.
Loudly.
With witnesses.
Amber drops her cup.
Eula drops a dagger.
Varka, back from his twenty-seven-year camping trip or whatever, raises one bushy eyebrow like he’s watching a live drama.
Albedo does not react.
Which is somehow worse.
He doesn’t flinch. Doesn’t blink. Just keeps watching.
Kaeya swears he can hear the gears turning in Albedo’s brain. It's the same look Albedo had once given a five-armed Abyss creature before cutting open its skull and discovering its respiratory system worked via light absorption.
Albedo pushes off the wall and walks toward him.
It’s slow. Purposeful. One hand still behind his back, where he’s likely holding a test tube filled with something explosive and romantic.
Kaeya’s heartbeat goes critical.
“Captain Kaeya,” Albedo says, coming to a stop in front of him, voice as calm as ever.
“Chief Alchemist,” Kaeya returns, with a smile that is only half panicked.
“You’re injured.”
Kaeya looks down. There’s a gash on his forearm. Huh. Blood.
“Oh,” he says faintly. “Right. That. Minor. Purely decorative.”
Albedo doesn’t answer. He reaches out without asking and takes Kaeya’s arm.
And Kaeya—
—Kaeya, brave, chaotic, renowned Cavalry Captain of Mondstadt, melts.
Albedo’s hands are cool, clean, and precise. The way he touches Kaeya is clinical—except for the way his thumb brushes along Kaeya’s wrist and lingers there, like he’s mapping his pulse.
“You should have had this looked at immediately,” Albedo murmurs, already pulling something from his belt—probably a salve or healing agent, but Kaeya wouldn’t notice if it were acid.
“I would’ve,” Kaeya replies, trying not to audibly whimper, “but I was too busy being stared at like I’m a particularly complex diagram.”
“You are a complex diagram,” Albedo mutters. “And a reckless one.”
“You like that about me.”
Silence.
Albedo tapes the wound in quiet, then finally, finally looks up—and Kaeya almost collapses.
Because the look in Albedo’s eyes is not neutral. Not analytical. Not even scientific.
It is something closer to—what?
Yearning?
Fascination?
Desire?
No. Impossible.
But Albedo’s voice is quiet when he says: “You shouldn’t call me that. In front of others.”
Kaeya’s stomach drops like a rock off Starsnatch Cliff. “Ah. Right. Sorry. I didn’t mean to—”
“I don’t dislike it,” Albedo interrupts, firm. “I simply… don’t think I understand it.”
Kaeya swallows. Hard.
“What’s not to understand?”
Albedo lets his fingers fall away from Kaeya’s arm. “Terms like that. Sweetheart. Darling. They’re meant to indicate something, yes? Ownership? Intimacy? Affection? Possession?”
Kaeya’s voice is low now. Unsteady. “Is that what you think?”
“I think I’m still… analyzing it.” Albedo cocks his head. “Do you intend to possess me?”
Kaeya blinks.
Behind them, someone—Lisa, probably—gasps softly and mutters “Oh my Archons” like she’s watching an opera spiral toward act three.
Kaeya tries to answer and fails.
His mouth opens. Then closes. Then opens again.
He exhales.
“Albedo,” he says, and it comes out soft, roughened at the edges. “I’m not trying to possess you.”
“No?”
“No,” he repeats. “I’m just trying to… I don’t know. Make you laugh. Make you look at me like you’re doing right now.”
Albedo stares.
“And?” he asks, after a pause.
“And what?”
Albedo leans in, just a fraction. “Is it working?”
Kaeya laughs. Short, sharp, helpless.
“Yes,” he admits, shaking his head. “It’s working a little too well.”
Later that day, after the crowd disperses and Kaeya has made exactly three scandalized old women fan themselves, he finds Albedo in the library.
Not working. Waiting.
Kaeya pretends to be composed. He leans on the desk, arms crossed.
Albedo doesn’t look up from his notes when he murmurs, “Do you mean it?”
Kaeya pauses. “Mean what?”
“When you call me those things. Sweetheart. Darling. Starlight.”
Kaeya opens his mouth. Closes it. Opens it again.
He could joke.
He could deflect.
He could say, “Of course not, it’s just banter, you know me.”
But he doesn’t.
Instead, he says—quietly, honestly, like he’s finally admitting something to himself—
“Yes.”
Albedo’s pen stills. He does not look up.
Kaeya continues, because now he has to.
“I mean it. Every time. Not just because you’re beautiful, which you are. But because you look at the world like it’s a puzzle you’re halfway in love with. Because you make silence feel like conversation. Because you make me want to learn your language just to be near you without breaking anything.”
Silence.
The kind that aches.
Then—
“You haven’t broken anything,” Albedo says, very softly. “Not yet.”
And he finally, finally lifts his gaze.
V. In which Kaeya snaps, Albedo watches it happen, and the only thing more dangerous than romantic tension is when someone names it aloud.
By now, it’s a phenomenon.
Kaeya shows up.
Albedo lets him.
There is science. There is flirting. There is longing in terrifying concentrations, enough to warrant an official report from Jean titled “Someone Tell Them, Please, I’m Begging.”
And still—still—they remain not dating.
They hover in that breathless margin between knowledge and confession. Like an unstable compound waiting for one more drop to tip the whole reaction into combustion.
Today, that drop arrives in the form of a letter.
An official request from the Knights of Favonius, sent directly to Albedo’s personal research division, stating that one (1) Cavalry Captain Kaeya Alberich has been placed under temporary mandatory reassignment to the lab for a collaborative alchemical expedition.
There is no name signed at the bottom.
But Lisa is drinking wine before noon, and Jean is in hiding, and Sucrose is hyperventilating into a beaker.
So. One can guess.
When Kaeya hears, he bursts in with all the force of a romantic tragedy about to climax.
“You’re kidding,” he says, half-laughing, half-panicked. “You’re telling me I’ve been assigned to you?”
Albedo looks up from the letter, expression blank.
“It appears so.”
Kaeya throws himself onto the nearest bench like a martyr on a slab.
“This is unethical. This is cruel and unusual punishment. This is everything I’ve ever wanted, and I hate it.”
Albedo sets the letter aside. “You don’t want to work with me?”
Kaeya groans. “I want to kiss you until my knees give out. I’m trying very hard not to die in your presence, sweetheart.”
He says it without thinking.
Just—sweetheart—again, again, always. Like the only language left in his mouth is you you you.
And this time—
Albedo reacts.
Not subtly.
Not silently.
He goes still. Slowly. Like a cat that just noticed the hunt has changed.
“You’ve said that before,” he murmurs. “Multiple times.”
Kaeya, now face-down on the bench, groans into the wood. “Yes. Yes, I have. Because I’m in love with you and I don’t know what the hell to do about it.”
Silence.
Kaeya does not look up.
He can’t look up.
He’s prepared for rejection. For confusion. For that infuriatingly serene “interesting” Albedo gives when Kaeya says something stupid and emotionally compromising.
What he’s not prepared for is this:
The sound of Albedo rising from his chair.
The near-silent steps across the floor.
The feeling of gloved fingers—delicate, deliberate—pressing just under his chin and tipping his face up.
Kaeya freezes.
Albedo stares down at him. His hair falls like a curtain of sunlight and frost. His expression is not blank.
It is very nearly tender.
“Say it again,” Albedo says quietly.
Kaeya’s heart implodes.
“W-what?”
Albedo’s voice does not waver. “Say it again.”
Kaeya swallows.
His voice, when it comes, is cracked glass wrapped in velvet. “Sweetheart.”
Albedo closes his eyes. Just for a moment. Like it physically affects him. Like Kaeya just fed him something warm and dangerous.
“Kaeya,” he says.
“Yes?” Kaeya whispers.
Albedo leans in.
And for the first time in months of flirtation, tension, endless unspeakable hours of almost, he says—
“I think I understand what you mean now.”
Kaeya’s breath catches.
“Do you?”
“Yes,” Albedo replies. “I think I might… want it, too.”
“Want what?”
“You,” Albedo says, simply. “The way you say my name. The way you call me things you’re not supposed to. The way you look at me like I’m a miracle.”
“You are,” Kaeya says, before he can stop himself. “You are my miracle. My disaster. My greatest theorem, and I haven’t even solved you yet.”
Albedo exhales.
He leans in.
Kaeya, idiot that he is, leans forward to meet him.
Their mouths are a breath apart. Closer. Closer—
And then—
The door bursts open.
“—ALBEDO, THE REAGENTS ARE LEAKING AND THE—”
Sucrose freezes in the doorway. She takes in the scene: Kaeya half on the bench, Albedo bent over him like he’s about to perform open-mouth alchemy, both of them still suspended in a perfect tableau of romantic crisis.
Sucrose drops the tray she’s carrying.
It clatters.
No one moves.
Finally, Albedo straightens.
Kaeya immediately collapses backward and covers his face with both hands.
“I’ll… come back later,” Sucrose says faintly, and vanishes like a ghost.
Later that night, Kaeya doesn’t sleep.
He stands outside the lab, staring up at the stars, one hand curled around a glass of wine he hasn’t touched.
He thinks about Albedo’s hand under his chin.
About that near-kiss.
About the way Albedo said you.
And then the door opens behind him, and there is Albedo, holding two steaming cups of black tea, eyes still unreadable.
“You left quickly,” he says.
Kaeya doesn’t turn.
“I thought I might explode.”
“Ah,” Albedo says. “Understandable.”
There’s silence.
Then Albedo says, soft and unsteady:
“I’ve been thinking.”
“Dangerous,” Kaeya mutters.
Albedo doesn’t smile. But he doesn’t leave either.
“I’ve been thinking,” he says again, “that perhaps you were right. About calling me things.”
Kaeya turns, finally.
“And what do you want me to call you?”
Albedo lifts one shoulder. “Whatever you like.”
Kaeya takes a step forward.
“And if I like beloved?”
Albedo’s eyes flicker.
“Then I suppose,” he says, “you’ll have to teach me how to say it back.”
+1. In which Albedo says it, Kaeya breaks down, and the experiment finally reaches its most beautiful conclusion.
The moment does not come quickly.
It is not some grand kiss in the snow, no sudden romantic confession shouted from rooftops or whispered in fevered moments.
Instead, it arrives like all the best scientific revelations do:
After months of meticulous trial and error.
Of too much data.
Of wildly unreliable variables.
Of near-combustion, failed hypotheses, and one (1) Cavalry Captain pacing holes into his own bedroom carpet every night whispering, What does he want from me? What does he want from me? What does he—
And then, one morning, Kaeya walks into the lab and finds it empty.
Utterly, eerily empty.
No glass vials scattered. No Sucrose scuttling past with her hands full. No scent of frost and graphite and the quiet burning ozone that follows Albedo like a second skin.
Just a note, pinned neatly to the door.
Kaeya,
Meet me at the ridge.
Come alone.
(Please.)
—A
Kaeya stares at it for ten full seconds before bolting so fast he knocks over three chairs and forgets his sword.
He finds Albedo at the top of the cliff just west of Dragonspine, not quite the summit, but high enough that the wind bites and the sky stretches cold and soft like an unspoken prayer.
Albedo is already there, seated on the edge of the rocks, legs dangling like a child. There's a half-finished sketchbook in his lap.
He doesn’t look up when Kaeya arrives, breathing hard and vaguely ready to propose or perish.
Kaeya slows. “You didn’t say why.”
“I didn’t need to,” Albedo says, still staring into the sky. “You’d come anyway.”
Kaeya laughs once. Sharp. Tired. “You’re cruel.”
“No,” Albedo murmurs. “Just thorough.”
Another silence.
Then:
“I’ve been thinking about... nomenclature,” Albedo says, soft, precise, each syllable dissected like glass. “About the function of names. Of labels. Of why we say what we say.”
Kaeya sits beside him.
Careful. Reverent.
His voice comes quieter now. “You mean how I keep calling you things I probably shouldn’t.”
Albedo nods. “I used to think names were simply reference points. Identifiers. But the more you said them, the more I realized they weren't... about me at all.”
Kaeya turns to look at him.
“They were about you.”
Albedo glances over, finally. “How you see me. How you choose to see me. Even if I didn’t understand it… I wanted to. So I studied. I watched.”
“Studied,” Kaeya repeats. “Of course you did.”
Albedo doesn’t flinch. “It was an emotional experiment. I had to be certain.”
Kaeya’s throat tightens. “And what did you conclude?”
Albedo closes the sketchbook.
Then, softly—
“That it’s my turn.”
Kaeya blinks. “Your turn?”
“To say something,” Albedo murmurs. “To call you something. Not because I understand the name fully. But because I’ve started to understand you.”
Kaeya cannot breathe.
And then Albedo turns to him, eyes wide and calm and honest, and says, like he’s revealing the solution to a century-old riddle:
“My love.”
Kaeya shatters.
Not like a man weeping in public. Not like a dramatic sob. No.
He folds, like a tower finally collapsing under the weight of quiet affection.
His head drops forward, hand in his hair, laugh rasping out of his chest like a bark. “You’re unbelievable.”
“I am,” Albedo agrees.
“My love, he says. Just—casually. After I’ve been calling you darling for six months and crying into my wine.”
“I didn’t want to do it until I meant it,” Albedo says. “Now I do.”
Kaeya’s voice breaks. “Say it again.”
Albedo doesn’t hesitate. “My love.”
Kaeya makes a sound not meant for polite society.
Albedo raises one pale brow. “You’re remarkably responsive to auditory stimuli.”
“I’m remarkably in love with you,” Kaeya growls.
Then, before Albedo can analyze a single thing more, Kaeya grabs him by the front of his coat and kisses him.
It is not a careful kiss. It is not gentle or precise or studied.
It is everything Kaeya has been holding back for months.
It is the sound of wind through stone, of blood racing, of hands clutched in fabric and mouths crushed together like oxygen was a theory all along and this is the real proof of life.
Albedo kisses him back like a discovery.
Like something dangerous he wants to name.
They pull apart slowly. Too slowly. Like men climbing back into gravity after floating in vacuum.
Kaeya’s voice is low. Ragged. “Do you want me to stop?”
“No,” Albedo breathes.
“Tell me again.”
“My love.”
Kaeya kisses him again.
This time slower.
Surer.
Later, after the sun has set and the stars begin their quiet rise, Kaeya lies back in the grass, Albedo half-curled against his side, head resting just over his ribs.
He speaks softly. “You always name things after their properties. Stars. Stones. Reactions. You call them what they do.”
“Yes,” Albedo murmurs.
“And what do I do?”
Albedo’s voice is calm. Steady. Certain.
“You ruin me,” he says. “You rebuild me. You make my heart beat in ways I still don’t have words for.”
Kaeya exhales. “So I’m a process.”
“You’re a miracle,” Albedo whispers.
Kaeya smiles against his hair. “I’ll accept that.”
Albedo’s hand finds his. He laces their fingers with meticulous precision, like even this is part of the experiment.
And then—
“Kaeya,” he says.
“Yes?”
“You are mine,” Albedo says, so quiet it might be starlight. “You, love.”
Kaeya stops breathing again.
“Say it again.”
“You, love.”
And Kaeya, Cavalry Captain, flirt, fool, lover, stares up at the stars and laughs—wild and ruined and entirely undone.
Because finally, finally, it’s working both ways.