Mitsuji Kaoruko

A beautiful older woman who lives next door to Kotaro and his wife. She is the daughter of a wealthy and famous family.

She is calm and gentle, and although currently single, she used to be married and has a married-like sexiness.

She seduces Kotaro as soon as he moves in and enjoys a “casual relationship” with him. She also loves Rina as a younger sister and they get along well.