中山 芳枝

Mother of Yuuichi's bestfriend, Nakayama-kun and a friend of Chie from school, she often goes to the infirmary for counseling.

She also has a close relationship with Misako as fellow parents. Yuuichi also knows her because he often visits her house. When Yuuichi becomes active in "club activities", she seduces him into a physical relationship.

Yuuichi feels guilty having sex with his best friend's mother, Yoshie however is all smiles. Just what is the whole story behind them...?