Jung Jung Yeon

18 years old girl.

Coming from an average family,

she learnt how to be indepent by the age of 14.

She collected all her savings and by the age of 17 , 

she moved to the big city,

transferred to another school for a better future.

Park Chan Yeol

18 years old boy.

Coming from a rich family,

he learnt that the money can rule the world.

But he is not a playboy or any rich jerks that you can find in fictions,

he is a "Happy Virus",

that will make anyone smile even if they are having a bad day.