A graduate of a national literature department, Yu once aspired to be a literary researcher. During her school days, she met and married her husband, and now they have a son in ● grade. She was living a noisy yet peaceful daily life... One day, her son brought friends home for a study session. As she spent time with her son's young and robust friends, Yu's hidden sadistic tendencies began to stir. Thus, Yu schemed not only to teach them schoolwork but also to educate them in sexual matters…
