This story is about Chanyeol and Eunji.Eunji is suffering from depression due to her dark past.No one knew what was her dark past.She used to be a very happy and cheerful girl.She has closed her heart to everyone,even her friends.Then,she came across a boy called Chanyeol.Chanyeol is a happy virus,he smiled every second, even when he was sad because he knew that smiling gives away pain.Chanyeol has a target now....To make Eunji smile again. Two different worlds collapse, can they make it?  ForewordMain Characters : Eunji​"I have no time for me to smile,no tears left to cry."suffer from depression due to her ex boyfriend.used to be a very happy & cheerful girl.is very pretty,but use her hat to cover her face.is secretly rich. Chanyeol"Smiling cant solve anything,but at least it gives the pain away."A new transfer studenta happy virus;smiles everytime.becomes interested in Eunji,wants to know the reason she suffer from depression.had fallen in love with Eunji but he doesnt know...yet.