Rin lives with her son Kazuya while her husband is on a long business trip. One day, Kazuya's classmate Ashida visits to apologize for bullying him... Rin can't help but feel sympathy for his sincere apology and starts taking care of him in various ways. However, Ashida's true intention is to ● her... Once alone with her, he forcefully consummates their relationship. Despite it being unavoidable, Rin struggles with the guilt of her infidelity with her son's classmate. Yet, her body can't suppress the longing for the pleasure she hasn't felt in a while...
