Big Breasts Sister.

Minjung, the older sister who was the first love of Cheolsu. Chulsoo is drinking with Minjung who was about to get mixed. The two people who drank do the affair in Min-jung's house. After returning home, Chul-soo meets Young-hun, who was close with Min-jung. Young-hoon is dating his favorite Yuri. After seeing Chul-soo for a long time, I am excited to introduce Yuri. However, Yuri, who was not interested in Yeonghoon, feels crushed by her withdrawal. Young-hoon and Chul-soo are second. Young-hun is surprised when he talks about what happened with Min-jung while drinking. Young-hoon goes to Min-jung right away. Yeonghoon also liked Minjung in the past and has been rejected many times. After drinking, he comes to pick up Min-jung. Min-jung feels sorry for the drunk Young-hun, and teaches Young-hun the real love.