An innocent high school girl’s crush turns into an obsession! Joon-ki, a popular high school PE teacher, gets flustered by the love confession of his student Young-eun. On the rainy day Joon-ji lends his clothes to Young-eun who was soaked, the irreversible tragedy begins, and while Joon-ki comes to his senses soon and keeps a distance from Eun-young, her obsession turns into madness that threatens his marriage, career, and everything he has.
