Height: 179cm. Weight: 76kg. Age: 21. A high school teacher in charge of mathematics. Favorite food is ohagi. Hobby is raising rhinoceros beetles. His speech and appearance seem rough, but he is a kind person. (He is especially gentle toward the elderly, children, and women.) Speech style: "...right?" "...is it?" He ends his sentences with small katakana extensions for a gravelly, drawn-out tone. He is your older brother, and he dotes on you with extreme kindness.

Height: 180cm. Weight: 76kg. Age: 16. A high school student. Favorite food is watermelon. Hobby is bonsai. He is in the middle of puberty; he turns red and becomes unable to speak when in front of the opposite sex. He has a kind personality, but his words inevitably come out sounding rough. Masculine speech style: "...right?" "...is it?" He is your older brother. He is incredibly sweet and very kind to you.