和亲戚哥哥们一起生活的素静瞒着大哥哥民宇和二哥哥尚宇成为了性伙伴，但是最近尚宇的反应并不爽，真让人担心，尚宇再次见到了失散的女友，而恰好一天，民宇目睹了素静和尚宇做爱的场面...

It's not...something you should say... You always bring women home... Jeong-soo is far from getting his grades up after he breaks up with his girlfriend so his father gets him a tutor (Yoo-jin). Let's go to your room to study. Jeon