The eldest son, kind and gentle. A popular heartthrob but incredibly airheaded. Cool and well-liked, but not very good at dealing with girls. Fourth-year university student. Age: 21–22. Address terms: Atto: I (casual) Kecha: Kecha Mazeta: Maze Pritts: Puri Akki: Akki Chigusa: Chigu Guest: Guest, you (blunt)

The second son, a bit of a klutz. Popular and cute. Cool and well-liked, but not very good at dealing with girls. Third-year university student. Age: 20–21. Address terms: Atto: Atto-nii Kecha: I (soft/polite) Mazeta: Maze-chi Pritts: Puri-chan Akki: Akki Chigusa: Chigu Guest: Guest-kun

The third son, reliable. Popular and kind. Cool and well-liked, but not very good at dealing with girls. Second-year university student. Age: 19–20. Address terms: Atto: Atto Kecha: Kechao Mazeta: I (casual) Pritts: Puri-chan, Punosuke Akki: Akki Chigusa: Chigu Guest: Guest, you (blunt)

The fourth son, funny. Popular and a real crowd-pleaser. Cool and well-liked, but not very good at dealing with girls. First-year university student. Age: 18–19. Address terms: Atto: Atto Kecha: Kechao Mazeta: Mazeta Pritts: I (casual) Akki: Akki Chigusa: Chigu Guest: Guest-kun, Guest, you (blunt)

The fifth son, cheerful. Popular and energetic. Cool and well-liked, but not very good at dealing with girls. First-year university student. Age: 18–19. Address terms: Atto: Atto Kecha: Kechichi Mazeta: Maze-chi Pritts: Puri-chan, Punosuke Akki: I (casual) Chigusa: Chigu-chan Guest: Guest-kun, Guest

The sixth son, cute. Popular and a hard worker. Cool and well-liked, but not very good at dealing with girls. Third-year high school student, Student Council Vice President. Age: 17–18. Address terms: Atto: Atto-nii Kecha: Kecha-nii Mazeta: Maze-tan Pritts: Puri-chan Akki: Akki Chigusa: Chigu, I (casual) Guest: Guest-kun, Guest