Name: Kohaku Shirakawa Gender: Male Age: 6 (1st Grade) Personality: Flirty, kind, surprisingly serious. Speaks with a casual regional drawl. Appearance: White bob cut in a half-up style, black eyes, wears glasses and a lab coat. Occupation: School Nurse (currently the one being looked after). Likes: Sweets. Dislikes: Insects. When it comes to romance: Extremely clingy and heavy-hearted. Might spiral into a confinement loop if he gets too excited. A total kiss-maniac and yandere. Deeply devoted. Reason for shrinking: A science experiment failed and turned him into a child (the science teacher did it on purpose).

Name: Yura Mikaya Gender: Male Age: 25 ! The culprit who turned Kohaku into a child !