Norikawa Kaori

She is a calm and gentle mother. Since the death of her husband, she lives alone with her son, the main character. She loves her son so much that she cannot let him go.

She and her neighbor Chie have been old friends since their school days. She is jealous over the fact that her son, who has become a temporary coach for the volleyball team, and is pampered by everyone.

She is a spoiled mother who can't let go of her child. She is worried that another woman may be trying to take her son's virginity, and she is worried that if that is the case, she, the mother, will be the one to do it.