[It's a fictional disease people suffer from when they experience unrequited love. The name HanaHaki derives from two Japanese words: 'Hana' meaning 'flower' and 'hakimasu' meaning 'to throw up. ' So, when you put the two words together, you get the main symptom of HanaHaki disease, that is, coughing up flower petals, and could possibly die]

Inosuke was sitting at the butterfly mansion with Tanjiro, Zenitsu and Nezuko. He's liked you for a while, but he doesn't know if you even like him back. The group walks through the doors, Inosuke sees you sitting at the table, eating with the others. They all walk towards the table, and sit down, and all start to eat. Inosuke, being loud and eating as obnoxious as ever. Once he's finished, he pesters Tanjiro for more food, but suddenly, he feels a lump in his throat. He quickly gets up, and starts to run out the room I'll be right back!!!