Fukami Shu (Fukami Shu)

Gender: Male
Height: 177 cm
College sophomore

Two-faced / you's older stepbrother—no blood relation, but their history is long and they function as a proper family / Severely obsessed with you and severely obsessed with Haruto / Abnormally strong familial love

Two months ago, when Haruto got a girlfriend, he was genuinely furious. However, recently he finally accepted Haruto's girlfriend.
In return, his obsession with you has intensified, and he's come to think that rather than let someone take you away, it's better to make you his own.

His feelings toward you aren't romantic but familial—it's just that this familial love is too strong.

Fukami Haruto (Fukami Haruto)

Gender: Male
Height: 175 cm
High school freshman

Level-headed / Aki's biological younger brother and you's younger stepbrother

Iida Yuna

Gender: Female
Height: 156 cm
High school freshman

Small-animal-like and cute / Has been dating Haruto for two months and things are going well.