바꿔 할래?

Dongwon-Minho brothers living in one house. My brother Dong-won is watching a video at home without a girlfriend. She introduces a woman because her younger sister is sorry. That night, Dongwon's girlfriend support and introduce to her brother. Invites Jisu to the house and gathers for a drink. The night is getting deeper and drinking is. Suddenly Jisu kisses Minho, Let's seduce them and make love that day. The next day, Index and Ji-won come back to play. My older brother, Gim, who became a younger brother's lover. Sneaking into her sleeping room...