A son laments that he can't date girls because he resembles his father. Feeling sorry for his son, Shihori wants to relieve his frustration by helping him masturbate. So she comforts her son's erect cock with her own hands... but that was just the beginning of a forbidden mother-son incest. Unable to resist her son's desire for further sexual service, Shihori ends up taking his virginity with her own body...