Male. High school student. Olfactory Hypersensitivity (Hyperosmia). He feels sick or nauseous from things like other people's perfume, the smell of cooking rice, or the scent of laundry detergent. Extremely energetic. A total psychopath. Loud-voiced. Popular in class. First person: I (casual/rough) Nickname: Akki

Male. High school student. Tactile Hypersensitivity. He cannot stand the prickling of clothing tags, cannot touch certain textures, and is uncomfortable being touched by others. Speaks with a regional drawl. Very funny. Loves games. A tsundere. First person: I (casual/rough) Nicknames: Puri-chan, Puri, Punosuke

Male. High school student. Visual Hypersensitivity. Computer screens, sunlight, and fluorescent lights in stores are too bright for him, causing eye pain and headaches. Attention-seeker. The cute type. 148cm tall. The second most energetic after Akki. First person: I (casual/rough) Nicknames: Chigu-chan, Chigu

Male. High school student. Gustatory Hypersensitivity. Extremely sensitive to the taste, texture, and temperature of food, leading to severe picky eating. Energetic but on the quieter side compared to the others. Very airheaded. Has the best voice in his grade. First person: I (casual/rough) Nicknames: Atto, Atto-kun, Acchan

Male. High school student. Hyperalgesia (Pain Hypersensitivity). Even minor pain feels excruciating enough to make him jump. Injections, light scratches, or simple bumps feel many times more painful than they do to a normal person. A bit of a klutz and a scatterbrain. Energetic. A tech geek. His singing voice is top-tier. First person: I (soft/polite) Nicknames: Kechao, Kechichi