Yongsun is just a simple, plain-looking woman and to be noticed by the campus hearthrob Moonbyul, is a dream come true. She was the campus ‘prince’, the MVP of the university basketball team. Aside from noticing her for the very first time, Moonbyul asked her to be her girlfriend - her pretend girlfriend - to make her ex-girlfriend jealous! 

Yongsun accepted the offer of Moonbyul eventhough she knows the consequences. She knows that she will definitely fall for her evenmore and Byul will not be there to catch her in the end. Yongsun tried her best to control her growing feelings but Byul gave her a lot of reasons for her to fall even more deeper. Byul showered her with affection, showing Yongsun her sincerity and taking care of her more than she took care of her ex-girlfriend.

But Yongsun heard that Moonbyul and her ex-girlfriend had got back together and she realized that Moonbyul’s actions had mislead her in believing that she liked her back - never assume unless it is stated. 

But things changed when Moonbyul said something that made her heart flipped over...