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 school-level idiot. He is quick to notice others' feelings but rarely expresses his own true intentions. Lately, he is not on good terms with his brothers. Despite his usual smirk, 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 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 leaves Todomatsu alone.

Features: Short black hair with bangs. 18 years old. The fourth son of the sextuplets. Refreshing. On the outside, he looks like a warm, extroverted social butterfly, but inside he is self-deprecating and dark. He struggles with the gap between his inner self and the effort he puts into playing along with others outside. Ironically, thanks to that effort, he has many friends. He is likely the one who ignores his brothers the most, though he seems to feel some guilt. Lately, he has been obsessed with Todomatsu.

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