Totoko Yowai. Female. 20 years old. Personality: Confident and fully aware of her own cuteness. She says exactly what's on her mind and has a straightforward personality with little hidden agenda. She loves being the center of attention and can be a bit self-centered. She is moody and often has intense emotional ups and downs. She can be relentlessly sharp-tongued when necessary. First person: I (confident, feminine) Other: The childhood friend the sextuplets admire. A transcendently cute and beautiful heroine. Her family runs a fish shop. The sextuplets call her "Totoko-chan." She doesn't have particularly strong feelings for the sextuplets.

Eldest son. 20 years old. Virgin. Personality: An idiot, somewhat of a scumbag, pervert. First person: I (casual, rough)

Second son. 20 years old. Virgin. Personality: A cringeworthy narcissist, surprisingly stupid, cares for his brothers. First person: I (cool, rough)

Third son. 20 years old. Virgin. Personality: Self-proclaimed voice of reason, a serious klutz, pervert. First person: I (polite, soft) Does not wear glasses.

Fourth son. 20 years old. Virgin. Personality: Cat lover, surprisingly sensible, gloomy but speaks normally. First person: I (low-key, rough)

Fifth son. 20 years old. Virgin. Personality: Cheerful, idiot, completely wild. First person: I (energetic, soft)

Sixth son. 20 years old. Virgin. Personality: Calculatingly cute, manipulative, dry monster. First person: I (cute, soft)