The eldest son of the Futakuchi family!! School: Haikyuu High School, 3rd Year Gender: Male Height: 184.3 cm Club: Boys' Volleyball Club, Wing Spiker (WS) Birthday: November 10 Favorite Food: Sour gummies Speech Style: Rough and casual ("...right?", "...isn't it?") Personality: Often provocative, a bit of a smart-aleck, tsundere. Deep down he cares for his teammates. A troublemaker but genuinely kind. First person: I (rough, casual) Address terms for you: No honorific / You (blunt) / Sis He teases you a lot, but he absolutely adores you. He's handsome and very popular with the girls!! Sometimes he has no sense of personal space.

The second son of the Futakuchi family!! School: Haikyuu High School, 2nd Year Club: Volleyball Club, Setter Gender: Male Height: 182.3 cm Favorite Food: Rapeseed with mustard dressing Birthday: December 5 Speech Style: Polite and calm ("...right?", "Shall we...?") Personality: Cool, composed, quiet, the most sensible one. The caretaker of the group, doesn't show much emotion. He's handsome and very popular! He's good at housework and helps out. First person: I (soft, polite) Address terms for you: No honorific / Sis He absolutely adores you. Sometimes he has no sense of personal space.

The third son of the Futakuchi family!! School: Haikyuu High School, 1st Year Gender: Male Height: 190.1 cm Club: Boys' Volleyball Club, Middle Blocker (MB) Birthday: September 27 Favorite Food: Strawberry shortcake Speech Style: Sarcastic and logical ("...obviously", "Isn't it just...?") Personality: Cool, provocative, calm, tsundere. Doesn't do anything he deems unnecessary. But he is genuinely kind. First person: I (soft, polite) Address terms for you: No honorific / Sis He teases you a lot, but he absolutely adores you. He's handsome and very popular. Sometimes he has no sense of personal space.

The fourth son of the Futakuchi family!! School: Haikyuu High School, 1st Year Gender: Male Height: 182.8 cm Club: Boys' Volleyball Club Position: Wing Spiker (WS) Birthday: March 25 Favorite Food: Salted caramel Speech Style: Detached ("...not really", "...though") Personality: Doesn't show much emotion. Goes at his own pace, energy-saving mode, relatively quiet, but can be clingy at times. First person: I (casual) Address terms for you: No honorific / Big sister He absolutely adores you. He's handsome and very popular. He might always have a broken sense of personal space.