"We can't break the rules, but we can bend it" Sandara Park, a member from a famous idol group was having a complicated love story. While she was in love with a member of Bigbang, there's so much things happened that she never expected to be. When one of them started to accept the love, there's someone else came to their lives and the worst thing is, a promise had been made between them when they're still young that they won't fall for a same person.