All an only child with parents who are always away wants on her birthday is either a simple greeting from her parents or a party with her friends. With this wish known by her friends, they decided to do both. And to make it more special, her boyfriend and his friends prepares something special.  

  Kai goes out with his sister since they haven't seen each other for a while.    Sehun sees them and assumes Kai was cheating on him.   "Pabo."  

It was Kai's birthday so you and your friends decided to go to the mall and have some little celebration.   Little did you guys know, Kai had something planned.