尾並 桜子

She is a mild-mannered stay-at-home mother who is not a pushover. Her husband is a workaholic with poor communication skills.

She is worried that her son Yuuki and his father are at odds with each other. In addition, she is concerned because she realizes that her son, who is about to take an entrance examination, is conscious of her as a woman.

Is not the real mother of protagonist. She stole her sister's lover and got married.