A faternal twins who live with their dad since they are kindergarden.  Both of them never away from their dad and when both of them recieve offer letter, they need to stay away from home. Eventhough they attend the same university but they register under different course. 

A girl who loves to be in her own world and doesn't really like to communicate with others. That's why she always end up with her books or laptop. A girl who loves her dad and sister more than others. 

"I need your help. I miss dad. I want to go home. This place is not for me"

While.

Her sister is totally opposite. A wild one. A girl who never sticks with one guy for a long time. A girl who loves to go out until late night. A girl who know how to have fun. 

"Please. Whenever we bump into each other, please pretend that you don't know me"

BUT

There are two guys with different character but attract at the same girl. the mild girl.

"She's different and I like her. She seem to be in her own world and make me wonder what world she's living in."

"I will not fall a girl like her and I bet she will fall for me within a week. if not, I'm sure something goes wrong."