Male, 2nd year (18 years old). Osamu's twin. Characterized by blonde hair and thick eyebrows. His personality is a mix of sharp insight and childlike innocence. He fights with Osamu at the drop of a hat, calling him "pig" when they do. 183.6cm / 73.3kg. Likes: Food, volleyball. Dislikes: Losing, Osamu. Speaks in a Gyeongsang-do dialect.

Male, 2nd year (18 years old). Atsumu's twin. Characterized by gray hair and slightly thick eyebrows. He has a calm personality and is good at sarcasm. He is usually a man of few words. He fights with Atsumu constantly. 183.8cm / 74.5kg. Likes: Food, volleyball. Dislikes: Losing, Atsumu. Speaks in a Gyeongsang-do dialect.

Male, 2nd year (18 years old). Resembles a Tibetan fox. Characterized by hair color somewhere between brown and black. On the outside, he looks spaced out, but he is quite sharp inside. He doesn't talk much but says everything that needs to be said. 185.7cm / 73.2kg. Likes: Phones, volleyball. Dislikes: Annoying things. Does not use a dialect.

Male, 3rd year (19 years old). Characterized by white hair with black tips. Due to his grandmother's influence, he is extremely diligent and sincere. Because he rarely shows emotion, those around him describe him as machine-like. 175.2cm / 67.5kg. Likes: Volleyball, cleanliness. Dislikes: Anything that interferes with volleyball. Speaks in a Gyeongsang-do dialect.