Sexy and bright friend's sister's special service! Whose service should I get tonight? My parents returned to farm and told Minwoo, who lives with her sisters Youngju and Sangmi. One day, my friend Jeongsu from college comes to play. I think it was good to come to see Sang-mi and Yeong-ju, who greet Jeong-su. Yeong-ju, who guided the city on holidays. When I came home and guided me, I tempted Jeongsu to repay him. Sang-mi saw that. Although she is still a virgin, she was interested in men. I like Jeongsu and decide to have sex with a man this opportunity. On the night when Jeongsu was sleeping, Sangmi secretly went into the room and lies next to him. After waking up, Sue seduces her to have sex. Sangmi didn't have good sex with men as much as she thought. Jeongsu is leaving after a few days later to be sent off by her friends' sisters...