Co-Authored Stories
Series Metadata
Listing Series
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A Light of HOPE by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, Undertale (Video Game)
19 Dec 2021
Tags
Summary
Chara's given another shot
Series
- Part 5 of Across the Veil
- Part 1 of Co-Authored Stories
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Demonolgy by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)
05 Sep 2022
Tags
Summary
Izuku gets turned into a demon, woow
Series
- Part 6 of Across the Veil
- Part 2 of Co-Authored Stories
- Part 1 of Demonology
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Himiko's tale by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga)
18 Apr 2024
Tags
Summary
Toga while running to recover from the fight against Curious gets sent to KnY by a childs quirk and now must survive in this new world
Series
- Part 3 of Co-Authored Stories
- Part 1 of Plot Device Kid's Manga Collection
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Demonology Chapter 16: Alternate Confessions by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia
28 Jan 2022
Tags
Summary
This takes place during Chapter 16: A Big Show
This is in the thought of Giyuu going to the bar with the other Hashira's who can take him home and hold a confession since We used a wheel to do the canon one in Demonology. Basically, these are what-if's this Hashira takes him home instead of someone else that will lead to a poly relationship between everyone.
Warning: It May spoil future chapters for Demonology but each one starts the same until the leaving portion. All other characters are descendants and original characters. Each version will have it's beginning notes explaining the original character's.
Series
- Part 4 of Co-Authored Stories
- Part 2 of Demonology
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What if Soulmates by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga)
05 Feb 2022
Tags
Summary
“Hide this… Never show it to anyone. Demon, Human, or Demon Slayer…”
“Only Demons have them.”
“The first time a human has developed a mark like this was connected to Muzan Kibutsuji. It’s often regarded as an omen if any human develops a Soulmark. Since only Demons have them and any humans that have it are often foreshadowed to die or worse.”
Series
- Part 3 of Demonology
- Part 5 of Co-Authored Stories
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Late V-day special by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)
19 Feb 2022
Tags
Summary
A tooth-rotting one-shot for valentines day with the Demon Humanitarians Hashiras.
Series
- Part 4 of Demonology
- Part 6 of Co-Authored Stories
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Rewinding our Wounds by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), 呪術廻戦 | Jujutsu Kaisen (Manga), 呪術廻戦 | Jujutsu Kaisen (Anime)
15 Jan 2026
Tags
Summary
Displacement is terrifying, even after her escape from Overhaul she wasn’t sure of what to do as it was the only chance she had from escaping that place. Even then, her escape provided an opportunity - an opportunity that Eri has ever thought to dream. Not when she is constantly being cut open for Kai’s experiments to erase quirks. Here, she is accepted. Here, she is loved. Here, she has the strongest protecting her - her Angel.
Series
- Part 2 of Plot Device Kid's Manga Collection
- Part 7 of Co-Authored Stories
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Compass Nerves by Cryst4lB34st, Kobalt_Cat_YS
Fandoms: 呪術廻戦 | Jujutsu Kaisen (Anime & Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga)
25 Feb 2026
Tags
Summary
Yuji’s body remembers a style he’s never learned: circular footwork and knuckle-driven counters akin to Destructive Death: Compass Needle. He feels “vectors” of killing intent rather than a flow of CE. Sukuna notices the archaic martial cadence and marks Yuji as different from the first possession.
Series
- Part 8 of Co-Authored Stories