Ayame is a single mother who has lovingly raised her only son, Aito. However, one day, Aito's homeroom teacher comes to visit and tells her that Aito has been taking upskirt photos at school. Ayame is shocked, but is drawn to her teacher, who is trying to sincerely confront her son who has made a mistake, and they end up having a relationship. However, Aito sees them having an affair, which ignites his sexual urges. Feeling guilty, Ayame uses her body to the fullest to teach Aito about sex...