Kiya Imanai was born into a cursed name - a daughter of the Imanai clan, a lineage soaked in rigid blood rituals, cruelty masked as tradition, and the expectation that her body would be used, not heard. Within her lived two sealed demons:
Naomi, the Sin of Rebirth - elegant, composed, and cold as frost.
And Shiro, the Sin of Destruction - wild, erratic, and hungry for chaos.
Torn between those two spirits and the weight of her clan's cruelty, Kiya grew into a vessel of controlled ruin. She was trained to obey, to endure, to never feel. But somewhere within, a quiet fire never died.
When the Shibuya Incident struck - and the world was ripping apart - Kiya disobeyed her clan's orders. Instead of protecting her family's twisted legacy, she chose to protect the people the clan deemed unworthy. In the chaos, she stood against the unthinkable:
Sukuna.
With her demons barely held in check, Kiya used her own body as a shield to save Megumi Fushiguro, the boy with shadowed eyes and a broken will. In that moment, Shiro screamed and Naomi wept - and Kiya shattered Sukuna's grip, proving her blood was not her fate.
After the battle, Kiya and Megumi, both scarred and half-alive, found themselves drawn to one another - not by words, but by shared silence. Where others saw destruction in her, Megumi saw resistance. And Kiya saw in him something rare: someone who understood the weight of inherited pain.
They fell in love slowly, honestly. Not with grand gestures, but with steady breath.
And together, they built what their ancestors tried to bury.
A family.
A future.
A legacy stronger than blood.
Muichiro Tokito was mist - distant, untouchable, already fading.
Genya Shinazugawa was fire that refused to burn - all sharp edges and aching silence.
In the quiet between battles, their paths begin to cross. Not by accident - but by something softer. Something neither of them knows how to name.
From clashing swords to unspoken feelings, from bloodstained missions to soft nicknames whispered like secrets... this is the story of two boys learning how to stay.
A tale of found family, grief, tenderness, and the kind of love that doesn't ask for permission - it simply lingers, like mist after rain.
⚠️ Disclaimer:
This is a fanmade Kimetsu no Yaiba AU featuring Genya × Muichiro as a slowburn romance. All characters and original source material belong to Koyoharu Gotouge. Any art that you might see is also not mine and all credits go to there original owner(s).
This is an alternate universe (AU) where certain events, outcomes, and character fates differ from canon. Because of that, some scenes, dynamics, and timelines are changed for storytelling purposes.
Chapter Twenty-Eight is inspired by Chapter 204 of Demon Slayer, but has been reimagined with additional content, new context, and alternate outcomes to match the direction of this story.
If any part of this work happens to resemble another fanfic or idea, it is entirely unintentional and not meant to copy anyone else's work - unless I've already talked about it directly.
This is a personal, original project created out of love for the characters and story.
Happy reading!💙