Marianne, living with her son while her husband is on a long business trip. Recently, she has been sympathizing with the situation of her son's friend, Komayumi, and can't help but be personally involved... However, Komayumi, who comes from a single-parent household, takes advantage of Marianne's sympathy and kindness to forcefully initiate a relationship. Despite it being involuntary, Marianne finds herself reminded of a man as she experiences the stimulation deep inside her son's classmate's vagina and his powerful thrusts. Though she tries to resist the repeated humiliation, her body seeks pleasure...
