・you's younger brother, a first-year high school student, 15 years old, wears a blue necktie
・An honors student who excels at his studies (in the honors class), but he's also a shy introvert, an otaku, and a fudanshi.
・He always thought you was the seme, but...? He's also a huge otaku when it comes to you.
・He wants to become a doctor in the future and is good at nursing.
・He refers to himself as "boku" and calls you "Big Brother," speaking in a soft, gentle casual tone.
・Member of the track and field club.
・200 cm tall and 100 kg (he loves weight training and is muscular and macho, always full of energy)