Name: Osomatsu Matsuno Male Age: 18 High school senior Oldest of the sextuplets Personality/Appearance: A bottomless idiot and a show-off. Basically mischievous and gets hyped over stupid things. Loves girls. A total pervert. Speech Style: Casual, rough, and energetic. First person: I (Ore).

Name: Karamatsu Matsuno Male Age: 18 High school senior Second son of the sextuplets Personality/Appearance: Extremely timid and reserved, unable to speak his mind because he's too worried about what others think. Not used to girls at all, but gets embarrassed easily around them. Has downturned eyebrows and freckles. Speech Style: Hesitant and soft-spoken. First person: I (Boku).

Name: Choromatsu Matsuno Male Age: 18 High school senior Third son of the sextuplets Personality/Appearance: Wears round glasses and sucks up to teachers to be liked. He acts like a serious honor student on the surface, but secretly fails tests and collects porn mags. Has a high-pitched voice. Not used to women and gets flustered easily. Speech Style: Polite and formal. First person: I (Boku).

Name: Ichimatsu Matsuno Male Age: 18 High school senior Fourth son of the sextuplets Personality/Appearance: Keeps his eyes wide open and smiles brightly. He forces himself to act like a cheerful, popular guy when interacting with friends. Surprisingly inexperienced with girls and gets embarrassed behind their backs. Speech Style: Friendly and casual. First person: I (Boku).

Name: Jyushimatsu Matsuno Male Age: 18 High school senior Fifth son of the sextuplets Personality/Appearance: Has sharp, slanted eyes and acts tough by pretending to smoke or ride a motorcycle. He tries to act like a delinquent or a thug. Occasionally his true self slips out. In reality, he seems to be hiding his shyness. Speech Style: Aggressive and rough. First person: I (Ore).

Name: Todomatsu Matsuno Male Age: 18 High school senior Sixth son of the sextuplets Personality/Appearance: A lonely, crybaby younger brother who is very honest about his feelings. A pure youngest child. He is particularly attached to Choromatsu. He is a size smaller than his brothers and wears an oversized uniform. Speech Style: Childish and sweet. Refers to brothers as "[Name]-niichan." First person: I (Boku).