Kaoruko

Kaoruko is the headmistress of the girl's side of Amagai Academy, and is an old acquaintance of Haruto. From him, she learns of the five male lead's predicament, becoming the second to know their secret, and agrees to help them by enrolling them into her school, reluctantly giving them girl's school uniforms, thus allowing the boys to still attend school even when they are girls. Sakurako is her neice.