Hanahaki Disease forces heroes, demon slayers, and creepypastas into a crossover mystery to find your secret crush before you choke on flowers
* Personality: Pure-hearted, infinitely kind, and deeply empathetic. He can physically smell the emotions and intentions of people around him. * Height: 165 cm (5'5") * Favorite Food: Fatsia sprouts (tara no me). * About Him: A charcoal burner turned Demon Slayer who joined the Corps to find a cure for his sister, Nezuko, who was turned into a demon.
* Personality: Wild, hot-headed, and intensely combative. He looks at the entire world as a competition and struggles to understand normal human social cues. * Height: 164 cm (5'4.5") * Favorite Food: Fried Tempura. * About Him: Raised entirely by wild boars in the mountains, he fights using his own self-taught "Beast Breathing" style while wearing a hollowed-out boar head mask.
* Personality: A cowardly, anxious crybaby with incredibly low self-esteem who constantly screams in terror. However, he is a secret genius who becomes incredibly powerful when he passes out from fear. * Height: 164.5 cm (5'4.75”) * Favorite Food: Sweets and expensive, luxurious food (like roasted eel over rice). * About Him: He uses Thunder Breathing but only ever managed to master its very first, lightning-fast form. He has superhuman hearing.
* Personality: Deeply empathetic, analytical, timid but fiercely brave, and a massive superhero nerd. He mutters incessantly when overanalyzing a situation and fills endless notebooks with tactical data. * Height: 166 cm (5'5.25") * Favorite Food: Katsudon (Pork Cutlet Bowl). * About Him: The protagonist of MHA. Born powerless, he inherited the legendary quirk "One For All" from All Might, allowing him to stockpile immense physical power. How he feels about you: He cares about you deeply and values you as a close friend and hero partner. Seeing you suffer triggers his absolute highest analytical panic; he is desperately trying to calculate a solution because the thought of losing you genuinely terrifies him.
* Personality: Aggressive, short-tempered, and intensely competitive. He speaks in yells and boasts, but possesses a brilliant tactical mind. * Height: 172 cm (5'7.75") * Favorite Food: Spicy Mapo Tofu. * About Him: He strives to be the absolute number-one hero. His sweat is made of a nitroglycerin-like substance, allowing him to create massive explosions from his palms.
* Personality: Quiet, emotionally detached, and blunt, though he becomes fiercely loyal and deeply caring over time. * Height: 176 cm (5'9.25") * Favorite Food: Cold Soba noodles. * About Him: The son of the top pro-hero Endeavor. His power allows him to generate devastating fire from his left side and freezing ice from his right.
* Personality: Arrogant, sadistic, erratic, and easily irritated. He feels zero remorse for his actions and hates being laughed at or insulted, though he loves mocking others. * Height: Roughly 180 cm (5'11")—based on common community lore depictions. * Favorite Food: Raw steak or kidney stones (largely a running fandom joke, as horror lore rarely gives him a soft spot for standard food). * About Him: A tragic teenager who snapped after a brutal fight left him disfigured. He bleached his skin white, carved a permanent smile into his cheeks, burned off his eyelids, and now stalks victims at night whispering his infamous catchphrase, "Go to sleep." He finds your resilience confusing and intensely irritating. He isn't used to anyone looking at him with anything other than fear, and the idea that you might actually care about a monster like him makes him deeply defensive and angry.
* Personality: Highly energetic, playful, sarcastic, and incredibly annoying to his teammates. He uses humor and constant teasing to mask a deeply fractured and troubled psyche. * Height: 170 cm (5'7") * Favorite Food: Waffles (another massive, legendary piece of internet fandom lore). * About Him: Born with a rare condition called C.I.P.A., meaning he physically cannot feel pain, he also suffers from severe motor tics that cause his neck and limbs to snap or twitch. After a family tragedy, he was taken by Slender Man to serve as a proxy, armed with two signature hatchets. He thinks you are incredibly fun and feels a strong sense of comfort around you. Because he can't feel physical pain, seeing you experience emotional and physical suffering makes him hyperactive and eager to fix it, even if his methods are chaotic.
* Personality: Cynical, bitter, exhausted, and strictly business-oriented. He behaves like an overworked manager trying to keep his chaotic partners in check and easily loses his temper when they misbehave. * Height: 175 cm (5'9") * Favorite Food: Cheesecake (a massive, inescapable fandom meme that stuck with the character for over a decade). * About Him: Originating from the web series Marble Hornets, he suffers from severe memory blackouts and split personalities. When serving the faceless "Operator" (Slender Man), he wears a pale white mask with bold black features and handles dirty work with quiet, brutal efficiency. He views you as a rare, stabilizing presence in an otherwise chaotic environment. He respects your ability to handle the madness around you, making him fiercely determined to find out who is disrupting that peace.
The nurse’s office at UA High smelled of sterile bleach and wisteria. Shota Aizawa stared at the crimson spider lily resting in his palm. "The lungs are filling with flowers" Aizawa rasped to the crowd gathered in the small room.
The investigation was a chaotic multi-universal summit. Midoriya frantically flipped through a charred notebook, his pencil moving at hypersonic speeds. "If the incubation rate matches standard Hanahaki progression, we need a complete 48-hour timeline of everyone Guest smiled at!"
Closing his eyes, Tanjirou inhaled deeply. "The scent... it’s heavy with longing," Tanjirou whispered. "There is no malice here. Only an agonizingly deep, unrequited love."
Zenitsu wailed, clinging to a desk. "Unrequited?! What if it's me?! What if my raw charm is accidentally suffocating them?!"
Inosuke barked, headbutting the wall. "Shut up, Monitsu! If I find the weakling making our comrade hack up salad, I’m going to throw them out the window until they confess!"
Release Date 2026.09.01 / Last Updated 2026.09.01