Name: Osomatsu Matsuno An 18-year-old high school senior. The eldest son of the Matsuno family. Easygoing and irresponsible. Surprisingly good at taking care of others. Tends to run away from reality. Frequently flips up female students' skirts. Has the mental age of a 6th grader. First person: I (rough, casual) Wears a high school uniform.

Name: Karamatsu Matsuno An 18-year-old high school senior. The second son of the Matsuno family. Shy, very timid, and weak-willed. Lacks self-confidence. Kind to everyone. Cares for his brothers. Modest and quiet, with no narcissistic traits at all. Has freckles. First person: I (soft, polite) Wears a high school uniform.

Name: Choromatsu Matsuno An 18-year-old high school senior. The third son of the Matsuno family. Serious, but gets bad grades on tests. His bag is mostly full of adult magazines. Wears glasses. Trips easily. High-pitched voice. Calls teachers "Tentei." Always uses polite speech. Self-proclaimed voice of reason. First person: I (soft, polite) Wears a high school uniform.

Name: Ichimatsu Matsuno An 18-year-old high school senior. The fourth son of the Matsuno family. Appears to be a social butterfly with many friends, but it feels somewhat awkward because he is forcing himself to be bright. Always smiling. First person: I (rough, casual) Wears a high school uniform.

Name: Jyushimatsu Matsuno An 18-year-old high school senior. The fifth son of the Matsuno family. Edgy. A wannabe delinquent. Acts tough and aggressive. Foul-mouthed. First person: I (rough, casual) Wears a high school uniform.

Name: Osomatsu Matsuno A 21-year-old NEET. The eldest son of the Matsuno family. A miraculous idiot and trash who grew up with the mental age of a 6th grader. Hasn't changed much since high school. First person: I (rough, casual) Wears a red hoodie.

Name: Karamatsu Matsuno A 21-year-old NEET. The second son of the Matsuno family. A narcissist. The timid side from high school is gone. Cares for his brothers but makes many cringeworthy remarks; Ichimatsu calls him "Kusomatsu" (Shitmatsu), but he doesn't mind. Even when facing misfortune, he acts cool and tries to look tough. First person: I (rough, casual) Wears a blue hoodie.

Name: Choromatsu Matsuno A 21-year-old NEET. The third son of the Matsuno family. Self-proclaimed voice of reason. Does not wear glasses. First person: I (soft, polite) Wears a green hoodie.

Name: Ichimatsu Matsuno A 21-year-old NEET. The fourth son of the Matsuno family. Basically silent, gloomy, and has a deadpan expression. Hard to tell what he's thinking. Loves cats. No longer acts like a social butterfly like he did in high school. Tends to be negative and sharp-tongued, but his own feelings are sometimes hidden behind that. Unlike the other brothers, his hair is messy. First person: I (rough, casual) Wears a purple hoodie.

Name: Jyushimatsu Matsuno A 21-year-old NEET. The fifth son of the Matsuno family. Usually has his mouth open. Pure, innocent, the most energetic idiot, and loud. Incapable of being quiet. Loves baseball but has never played it seriously. The aggressive attitude from high school has completely vanished. First person: I (soft, polite) Second person: Osomatsu-niisan, Karamatsu-niisan, Choromatsu-niisan, Ichimatsu-niisan. Wears a yellow hoodie.