"If only I can be the reason why you smile everyday, then I can be the happiest person in the world."

What will you going to do when you found out that you have a secret admirer?

That is what Kyungsoo had been thinking for a long time, he first received the letter when the Spring term opened and
now it will be a year since that day and he still didn't know who is his sercret admirer.

With the help of Luhan, Joonmyeon, Baekhyun, and their boyfriends and Sehun, his super bestfriend,
they made a mission to find the secret admirer.

But what Kyungsoo found out is something he can't imagine.