Chapter Text
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Ever since she could remember, Ran had always considered herself strong. Strong enough to throw a grown man across the dojo floor. Strong enough to chase down criminals, rush through dangerous situations, stand tall through emotional storms, and even stand by Shinichi’s side despite his endless absences.
She was strong, she had a great stamina, an overflowing energy—there was no questions about it.
Which was why the first sign felt so easy to dismiss.
It had been a crisp spring morning, the kind that usually filled her with a burst of energy, when she’d arrived at the dojo for her regular practice. She’d greeted the others with her usual grin, tied her hair back, and started her warm-up katas.
But halfway through the second set of punches, her lungs burned as if she’d run a marathon, and her breath came in short, shallow gasps. She paused, one hand on her knee, waiting for her strength to return.
“That’s odd,” she’d murmured to herself. She couldn’t remember the last time a warm-up had left her this winded.
Maybe the air was too dry that morning. Maybe she hadn’t slept well. She’d shaken it off and finished the routine, determined not to let a little shortness of breath slow her down.
But that feeling didn’t leave her. It followed her home, a subtle shadow she tried to ignore.
She noticed it again the next day as she carried grocery bags up the third floor of the Detective agency—their modest home.
Usually, she could manage them all in one trip without a hassle. It was like a secret test of strength she’d always passed with flying colors. But halfway up, she found herself pausing on the landing, chest tight, heart hammering like she’d just sprinted a hundred meters.
She’d laughed it off, telling herself she was just out of shape from skipping training a few times.
But deep down, it rattled her. She’d always been the one to carry the heavy load—groceries, her father’s paperwork, even other people’s worries. So why couldn’t she handle this?
She started to notice other small changes too: the way she had to stop to catch her breath after cleaning the agency’s floors, or how just a brisk walk to the train station left her with a faint ache in her chest.
Then the cough came next—a dry, scratchy thing that wouldn’t go away. At first, she blamed the spring pollen, but the cough lingered long after the cherry blossoms had fallen. It was persistent and it hurt.
One afternoon, Sonoko dragged her out shopping. Ran had tried to enjoy it—Sonoko's antics, gossips, the chatter as they enjoyed the dessert they bought at the café, the bright lights of the department store, the smell of new clothes.
But halfway through browsing a rack of dresses, she’d found herself leaning on the display, her vision swimming. Sonoko noticed immediately.
“Ran, you okay?” she’d asked, worry creasing her brow.
Ran forced a smile. “I’m fine, Sonoko. Just tired.” But her legs felt like lead, and every breath felt like a chore.
At home, she’d lie awake at night, staring at the ceiling, wondering what was happening to her. She’d always prided herself on her endurance. Karate tournaments, long adventures with Shinichi, cleaning the whole apartment top to bottom after one of Kogoro’s messes, even cleaning the massive Kudo mansion once in a while—she could handle anything.
But now... Now her own body felt alien, like it was working against her.
She remembered a day when she was thirteen, running laps around the schoolyard with Shinichi. He’d teased her—“Hey, you trying to leave me in the dust, Ran?”—and she’d laughed, effortlessly outpacing him. She’d been so confident then, so sure of her own strength. She wondered now where that girl had gone.
The night before everything came crashing down, she’d tried to do a simple kata in her room—just a few moves to keep herself sharp.
But after three punches, her chest seized. She doubled over, coughing and gasping. Tears pricked her eyes, half from the pain and half from the frustration. She sat on the floor, knees drawn to her chest, trying to catch her breath. Her body had always been her ally, but now it felt like a traitor.
The day it became impossible to ignore came one evening in the kitchen. She’d been chopping vegetables for dinner, humming to herself, Conan’s voice carrying from the living room as he helped her father organize case files.
The smell of miso and soy sauce filled the air, a comforting scent she’d always loved. She felt proud, in a small way, that despite everything, she could still make sure Conan and Kogoro were taken care of.
Then the dizziness hit.
A sudden wave of vertigo swept over her, and her knees buckled. The knife clattered to the counter, the wooden handle spinning. She grabbed the edge, knuckles white, struggling to draw in a breath that wouldn’t come. Her vision blurred at the edges.
“Ran-neechan?” Conan’s voice sliced through the haze. She felt his small hands on her arm, steadying her. “Ran-neechan, are you okay?”
She managed a shaky smile, though it felt fragile, like tissue paper. “I’m fine, Conan-kun,” she lied, voice trembling. “Just… just a little dizzy.”
Conan’s eyes widened, brows furrowed. “No, you’re not. Stay here.” His tone left no room for argument, his childish voice sounding so serious.
A moment later, Kogoro appeared, all bombast and worry. But one look at her pale face and his bravado vanished.
“Ran, you look terrible. We’re going to the hospital. No arguments,” he barked, his voice rough but his eyes glistening.
She was too tired to protest.
At the hospital, the sterile smell wrapped around her like a shroud. Dr. Araide, kind and reliable as ever, greeted them with a calm smile that didn’t reach his eyes. She was glad that the one attending to her was at least someone familiar.
He led them to an exam room and listened patiently as she listed her symptoms—the breathlessness, the fatigue, the stubborn cough, the dizziness.
When she finished, Kogoro crossed his arms and demanded, “Why didn’t you say anything sooner, Ran?! You’ve been carrying all this alone?!”
Ran looked down, her fingers knotting together in her lap, her chest tightening with a different reason.
“I… I didn’t think it was a big deal, Dad,” she admitted softly. “I thought I was just… tired or something.”
Kogoro’s face darkened, torn between frustration and worry. “Ran…”
Dr. Araide placed a gentle hand on Kogoro’s arm, his calm voice breaking the tension. “Mouri-san, it’s very common for patients to dismiss early symptoms, especially when they’re young and otherwise healthy. Let’s focus on understanding what’s going on so we can help her.”
Kogoro grumbled under his breath but said nothing more.
Dr. Araide asked a few more questions, and Ran tried to answer each one honestly. “No chest pain,” she said. “No fever, no night sweats. Just… tired. And the cough. And sometimes… like my chest feels tight.”
The doctor hummed, concern etched in every line of his face. “We’ll run some tests,” he said gently, describing blood work, chest X-rays, high-resolution CT scans, and pulmonary function tests. “It’s probably nothing serious, but let’s be thorough.”
Ran nodded, though her gut twisted with unease. Nothing serious, he'd said. She wanted to believe him. She had to believe him.
That evening, they sat together in the agency living room. Conan was seated beside her on the couch, alert and attentive, while Kogoro paced restlessly. Ran held her phone in trembling hands. She’d dialed her mother’s number at least three times before finally pressing call.
“Ran? Is everything all right?” Eri's voice, even over the phone, carried a note of concern.
Ran forced a small, steady tone. “Hi, Mom. Um… I was at the hospital. They did some tests on me today. I’ve been… feeling a little sick, and Araide-sensei wanted to check it out.”
Eri’s tone shifted from concern to alarm. “Sick? Ran, why didn’t you tell me sooner? Are you alone? Where’s your father?”
“Dad and Conan-kun are here,” Ran said, glancing at Kogoro, who pretended to study the bookshelf but kept glancing at her. Conan’s gaze was fixed on her, worry etched in every line of his small face.
“We’re all here,” Kogoro’s voice rumbled in the background. “We want you to come with us when we get the results, Eri. We don’t want Ran going through this alone.”
Eri’s sigh crackled over the speaker. “Of course. I’ll be there. Text me when you know the time.”
Ran felt a small measure of relief at her mother’s steady tone. Eri always knew what to do, even when Ran felt completely lost.
Days blurred into a haze of tests, waiting rooms, and quiet moments staring at the ceiling at night. She tried to keep life normal—cooking dinner, making sure Conan didn't run off into some danger, chatting with Sonoko.
But every time she climbed the stairs or carried a grocery bag, her body reminded her that something was wrong. Each time, the betrayal felt deeper.
When the results came in, they all gathered in Dr. Araide’s office: Her father, her mother, Conan—and Ran. The air felt thick, heavy with unspoken fears, Ran's anxiety coming in constant waves.
Dr. Araide entered with a solemn expression, furtherly adding weight to the growing tension in the room.
“Ran-san,” he began gently. “The tests show that you have a condition called Idiopathic Pulmonary Fibrosis. It means the tissue in your lungs is becoming scarred and thickened. It’s progressive—meaning it worsens over time. We don’t fully understand why it happens, but it makes it harder for oxygen to pass into your bloodstream.”
Ran blinked, the words hitting her like a physical blow. “It worsens?” she repeated, almost dumbly.
“Yes,” Dr. Araide continued, gently but firmly. “It’s a progressive disease, meaning it worsens over time. We don’t know exactly why it happens—sometimes it’s genetic, sometimes it’s environmental—but it can make breathing increasingly difficult. There’s no known cure, but we can try to manage the symptoms and slow the progression.”
She felt the air leave her lungs, the irony not lost on her. All the times she’d run headfirst into danger, and now it was her own body turning on her.
She looked at Conan—his eyes impossibly wide, lips parted as though he wanted to say something but couldn’t find the words. Kogoro had gone pale, his hands clenched into fists on his knees. Eri’s lips trembled, but she held Ran’s hand tightly, squeezing hard enough to hurt.
Then, Eri’s voice broke through the stunned silence, strong and clear. “Sensei, how will this affect Ran's daily life?” she asked, her lawyer’s tone steady, though her eyes shone with tears. “What do we need to do to help her?”
Dr. Araide met her gaze. “Fatigue will become more pronounced, and her breathing may worsen with exertion. She’ll need to avoid infections, pace herself, and listen to her body. Emotional support will be critical, as this is a life-changing diagnosis. We’ll work closely with a pulmonologist to manage her care.”
Ran’s mind felt like it had been plunged underwater. The doctor’s voice was muffled, drifting in and out of her thoughts as her parents asked more questions.
Terminal. Progressive. No cure.
She heard phrases like “oxygen therapy,” “possible lung transplant,” “medications to slow progression,” but it all blurred into a single, crushing truth: she was sick. Very sick. And nothing would ever be the same.
She wondered what would happen to her karate. Would she even be able to practice anymore? Would she have the strength to walk with Conan to school or to stand in the kitchen making dinner? Would she still be able to laugh with Sonoko over trivial things, or would every day be measured by how much oxygen she could pull into her lungs?
And Shinichi—what would he think? She’d always waited for him, always believed that one day they’d have their chance. But now she wondered if he’d even get the chance to say goodbye.
She felt the tears threatening to fall but forced them back. Not now. Not in front of everyone.
She had to be strong—she’d always been strong. And yet, for the first time in her life, she didn’t feel strong at all. She felt fragile, as though the smallest breath might break her.
When Dr. Araide finished explaining, she nodded, thanked him politely, and tried to process the onslaught of information. Medications, oxygen, lung transplant lists. Every word felt heavy. The room felt too bright, too quiet, too cold.
Conan squeezed her hand, his small, warm fingers grounding her. "Ran-neechan," he called, voice almost cracking. In his eyes were a series of emotions too complicated for a child his age.
Kogoro’s demeanor was uncharacteristically gentle when he asked, “Ran, are you okay?”
And Eri's composure showing a slight fracture as she held Ran's other hand. She didn't say anything but her presence, her closeness, soothed Ran's inner turmoil.
She managed a smile—a small, fragile thing. “Yeah, Dad. I’m okay,” she lied, because it was easier than the truth. “I’m okay.”
Deep down, she knew nothing would ever be okay again. Her body had betrayed her, and for the first time, she wasn’t sure she could fight back.
There was a coldness in her heart that came with this thought.
How would she deal with this?
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