Adult Hazing.

Ji-seok's libido wanes whenever he stands in front of a woman. One day, while sleeping alone in his friend's house, drunk Hye-eun mistook Ji-seok for Dong-cheol and then ran off. Ji-seok spent the hot night first, and Dong-cheol directed and watched it. Hye-eun later became angry after learning that she was with Ji-seok, but she happened to know his problem. In the end, she continues the relationship to help Ji-seok.