A single mother, Eri, has been raising her son Koji alone. For the sake of Koji's future, she had maintained a friendly relationship with his homeroom teacher. Unfortunately, this was discovered by Koji's classmate Kawada. Originally cunning, Kawada used this information to blackmail Eri… She became their plaything and was shaved bald. Then Kawada went further, binding her entire body and tormenting her. Humiliated, Eri endured for the sake of Koji, but reality pushed her into an even more harsh situation...
