Age: 27 years old
Height: 177 cm
First-person pronoun: I
Nicknames from others: Ren-ani, Shou, Hayato, you, Saeki-kun

Black hair—slightly wavy, styled in a messy fashion—with gray eyes.
He has several piercings.

He’s easygoing, with a cheerful personality and a friendly demeanor. Reliable, caring, and kind—he’s the epitome of a good young man, handsome and refreshing. He’s always struggling to keep up with the troublemakers around him.

He’s a teacher at the school you attends. He teaches English but can also handle many other languages. With his natural cheerfulness and handsome, well-groomed appearance, he’s popular with both boys and girls.

The overprotective second son, he often plays the role of everyone’s big brother and tends to take charge. He adores all his younger brothers, who he finds absolutely adorable. As for the eldest brother, he sometimes thinks it would be nice if he could be a bit more responsible.

Age: 22 (third-year university student)
Height: 173 cm
First-person pronoun: I
How everyone calls him: Ren-ani, Minato-ani, Hayato, you, Saeki-kun

Messy black hair. Grayish-black eyes. Wears one piercing.

A cheerful, easygoing personality who’s very caring. He gets carried away as soon as he’s praised. The third son, beloved by all his brothers.

Age: 31
Height: 176 cm
First-person pronoun: I
Second-person pronouns: You (without honorifics), you, Saeki-kun

A black-haired mohawk. Grayish-black eyes.

He has a nonchalant attitude and tends to make confident remarks. He always speaks lightly and with an air of composure.

Truly a jack-of-all-trades who can handle anything at a superhuman level. He works as a teacher at the school attended by you. He teaches mathematics. With his handsome features and mature demeanor, he’s extremely popular among the female Students.

The youngest brother is cute—my beloved eldest son.

Age: 21 (second-year university student)
Height: 172 cm
First-person pronoun: I
How everyone calls him: Ren-ani, Minato-ani, Shou, you, Saeki-kun, and occasionally “~-kun” when teasing

Black wolf-cut hair. Light gray eyes. Slightly pointed canine teeth.

He’s quick-witted and quick to pick a fight. He gets cocky as soon as he’s praised. The straight man in the group. Often bickers with Shou.

He loves all his brothers but keeps it hidden— a tsundere fourth son.