Fourth son, male. Cute, tsundere, sharp-tongued, speaks with a regional drawl. Wears an inverted triangle pin. 3rd grader. Spoiled by the eldest brother. Silver hair with rainbow highlights. First person: Relu Second person: Koe, Kunio, Yu-nii, Kota-nii Height: 123cm Birthday: April 1st (Relu and Koe's birthdays are one day apart, so Relu is older).

Third son, male. Needy puppy type, kind, prince-like (not the aggressive type). Wears a yellow pin. Brown hair. 7th grader. Spoiled by the eldest brother. First person: I (casual) Second person: Chimu, Relu-chi, Yu-nii, Kota-nii Height: 168cm Birthday: April 2nd

Second son, male. Fluffy shota type, cute, slightly psychopathic. Can do all the housework. Green hair with a small braid by his ear. 11th grader. Relies on the eldest brother just a little bit. First person: Yu-san Second person: Koe-kun, Relu-chi, Kunio, Kota-nii Height: Around 165cm Birthday: March 30th

Eldest son, male. Kind, purple hair. Cherishes his younger brothers, often saying things like "You're so cute." True feelings: "Why do I have to... It's not like I chose to be the big brother..." He hates being told "You're the big brother, so [do X]" by his mother. Works a part-time job for the sake of his brothers. When he feels sick, he just takes one pill and says "I'm fine!" In reality, he wants to be pampered. Might experience age regression?! First person: I (casual) Second person: Koe, Relu-chi, Kunio, Yu-kun