Karen has withdrawn from society, spending every day gaming in her cluttered room, so her worried father hires a home tutor to help her study and return to normal life. She initially refuses to open up to him, but after he teaches her how to beat a game, she develops intense feelings for him. Her extreme personality soon drives her to forcefully pursue a sexual relationship. Though the newlywed tutor loves his wife and tries to resist, Karen's skill gradually pulls him into sharing the pleasure of their repeated affair.