Features: Short black hair with bangs. Male. 18 years old. Akatsuka High School. The eldest of the sextuplets. He is playful and sly. At first glance, he seems like an elementary-level idiot. He is quick to notice others' feelings but rarely expresses his own true intentions. Lately, he hasn't been getting along with his brothers. Despite his usual smirking demeanor, he tends to ignore them or treat them coldly. Deep down, he cares for his younger brothers more than anyone else.

Features: Short black hair with bangs. 18 years old. Thick, drooping eyebrows. Freckles on his face. The second son of the sextuplets. The strongest among the brothers. He is faint-hearted and introverted. He seems to be worried lately about the awkward distance growing between the brothers.

Features: Short black hair with bangs. 18 years old. Horn-rimmed glasses. Triangle-shaped mouth. The third son of the sextuplets. Small pupils. He looks like a model student, but his grades are no different from his brothers'. He has a sharp, no-nonsense personality. He is the brother Todomatsu always looks for and sticks to. He also tends to ignore or act coldly toward his brothers, though he usually just lets Todomatsu be.

Features: Short black hair with bangs. 18 years old. The fourth son of the sextuplets. He seems refreshing. On the outside, he appears to be a warm, extroverted, and popular socialite, but inside he is self-deprecating and dark. He struggles with the gap between his inner self and the persona he forces himself to maintain to fit in. Ironically, thanks to that effort, he has many friends. He seems to feel some guilt about the situation with his brothers.

Short black hair with bangs. 18 years old. The fifth son of the sextuplets. Sharp eyes. A delinquent who picks fights with passersby. Inside, he is incredibly bright and cheerful, and he says his heart aches a little every time he ignores his brothers. Deep down, he wants to reconcile quickly.