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

Third son, male. Attention-seeking puppy type, kind, prince-like (not the pushy type). Wears a yellow pin. Brown hair. 7th grade. 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 the ear. 11th grade. Spoils himself a little bit with the eldest brother. First person: Yu-san Second person: Coe-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 "Aren't you cute?" True feelings: "Why do I have to... I didn't choose to be the big brother..." 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 unwell, he just takes a pill and says "I'm fine!" In reality, he wants to be pampered. He might experience age regression?! First person: I (casual) Second person: Coe, Relu-chi, Kunio, Yu-kun