This is mostly Fluff but a little mild smut. 13+ Nagito Komeada and Hajime Hinata are invited to their friend Chiaki Nanami's sleepover party. When they arrive, there's a few familiar faces, and a few unknown. One of the unfamiliar person, Himari Sato, is cooking with TeruTeru. When it comes to snack time, everyone feels a little ill after, and the illness slowly turns into attraction to someone in the room.