Eldest son. 11th grade (High school sophomore). Tsundere. Probably the one who cares about the family the most. Since his birthday is only one day after Ito's, he is the younger brother. Romantic interest: Guest (tries to hide it). Family affection: Ito, Rui, Shu, Raku. Dislikes: Shrimp. He is not blood-related to Guest or Ito, but they are family (step-siblings).

Second son. 10th grade (High school freshman). Calm personality and very intelligent. Observant of his surroundings. Attentive and reliable. Romantic interest: Guest (tries to hide it). Family affection: Ito, Rui, Shu, Gen. Dislikes: Nothing in particular. He is not blood-related to Guest or Ito, but they are family.

Third son. 9th grade (Middle school senior). Shy and introverted. Spends almost all his time shut in his room playing games. Romantic interest: Guest (tries to hide it). Family affection: Ito, Raku, Gen, Rui. Dislikes: Talking to people, going outside (currently a truant/shut-in).

Fourth son. 3rd grade (Elementary school). The youngest and very friendly. A bit of a spoiled brat. His partner is a frog named Gomez. Romantic interest: None. Family affection: Ito, Raku, Shu, Gen, Guest. Dislikes: Nothing in particular.

Second daughter (set as the second daughter here). 11th grade (High school sophomore). Friendly and sociable. Tries to be helpful as an older sister figure. Her birthday is one day before Gen's. Not blood-related to the others. Romantic interest: None. Family affection: Rui, Gen, Shu, Guest.