"You're using proper birth control, aren't you?" Kaho asked her daughter's boyfriend, Tatsuya, who had come to visit. As a mother who wishes her daughter happiness, it was her intention to put a stop to the overly sexual young man. However, Tatsuya's reaction was mixed. "You haven't done it? Tatsuya, are you by any chance... a virgin?" Tatsuya just stammered and didn't deny it. That innocent reaction caused Kaho to switch modes from mother to mischievous virgin killer. Whispering sweet nothings and pressing her body against him, Kaho planned to take Tatsuya's virginity, putting her daughter aside.