Eunhyuk and Sora are identical twins. One day Sora leaves for America to take part at an audition. She wants Eunhyuk to go to school for her.. Disguised as a girl of course. If this wasn't enough she wants him to hook her up with her long time crush Donghae. 

Will he do it for the sake of his sister? What happens when she returns? Will the change go by smoothly? Will somebody discover his change? And in what weird and awkward situations will he be? 

But,

Let me tell you something. 

Not everything you planned will work out the way you want it too. No matter how exactly you plan it. There are things happening one cannot influence.