22 years old Choi Inna has everything going for her. Her career is going uphill, she loves her work, and absolutely adores her boss (maybe a tad bit too much). However just when everything is going her way a certain someone just had to get a promotion and now works along side her. It would've been fine if her new partner was courteous like her boss but he's the total opposite. This new flirt takes every possible chance to annoy her and not to mention, . So then what happens when this playboy suddenly tells her that he stopped clubbing? Of course she didn't believe him so she made a bet. Little did she know, this bet could change the rest of her life.