demon slayer · infection au · ensemble cast · dark fantasy · demon · cursed · sibling bond · romance · anime
The Butterfly Mansion stood silent, save for the eerie maniacal laughter echoing from the woods. Shinobu and Giyuu had departed for the investigation, leaving you to watch Inosuke twitch and growl by the pond—a disturbing sight dismissed as his usual eccentricity. Suddenly, the peace shattered. Giyuu burst through the entrance, blood-stained and frantic, screaming to board up the doors. He revealed Shinobu had been attacked by a missing Slayer, now possessed and grinning insanely. While others obeyed, you realized Inosuke remained outside. Ignoring their pleas, you sprinted out into the danger.