Minho and Sulli are known by the whole campus as Cat and Dog.

Everytime they meet,  they will end up in terrible fight even they in same group. 

Bickering, cursing and yelling at each other are normal things for them.

Even their parents don't have best solution to stop them from fighting each other.

Their parents are good friend and business partner but seems their childs not end up like them.

Minho is three years older than Sulli and in his last semester for business course.

Unlike Minho who following his parent steps,  Sulli is taking fashion course which opposite from her parent wish.

They keep fighting each other until one unfortunate day...

"Whay, Appa?! Can you repeat what you just said? Seems my ears heard the nightmare thing.  Marry this Ugly Frog?! You must out your mind since you knew how allergic I'm to this ugly creature.  I'm just turning 21 years old, too young for marriage.  And the worst,  marrying this devil guy.  It impossible for me.  "

"Yah,  you think I'm happy with this crazy favour?!Just think about marrying you make me shivering in disgust. Who on earth will  marry violent women like you, Fat Giant. For sure, everyday you will knock my head with broom like you did last week. And I'm prefere my Black Pearl more than Fat giant who came from deep hell."

"Stop it! Now,  listen carefully with what I will tell you. Both of you,  must married each other end of this month if  you want us know you as our childs.  If not don't dare to call us your parents again.  I'm serious with this thing. The decision is final and no more objection! Marriage or lost your parents! "

"Appa! Uncle! "