Son Chaeyoung was in a quite big trouble and he knows no one that can help him in this situation--except from one person--his scheming little twin sister.

He begged for his sister's help and so she helped him. But of course it is Son Jaeyoung that he's dealing with so everything comes with a price--and that price includes Chaeyoung disguising as his twin sister to attend the university for a whole ng month.

Although he knew he will be ed up with her sister's plan he accepted her offer or the other way will be him end up staying in jail for God Jihyo knows how long.

'Just for a month. Endure this man' He tried to calm himself. 'Everything will be okay and will go as planned' 

He thought that he'll be just fine with the disguising thing as he enters the university until one familiar girl from his past enter the scene and suddenly became one of his roommates. Out of all the circumstances why the hell happens that they meet again in this situation--with him disguising as a girl?!

'Will she recognize me?'

He was startled. '! This can't be happening!' As clear as crystal clear, Chaeyoung remembered the last time he saw Myoui Mina and how this elegant girl just gave him a solid punch on his handsome face and a farewell kick to where it hurts the most.