For a long time, Jin thought of Sowon as the love of his life. But she broke up with him and left him hurt and confused about their relationship. Four years later, he meets her again, and she brings a dark secret with her. A secret that changes everything for him and for them. 

"Let's date and let's see who can move on faster."

If she is the sun, then he is the moon. If she is the sky, then he is the ground. She looks at brighter sides but he does not. They're everything the other isn't but fate wanted something from them- collision between their separate worlds.

A story about a group of girls and boys going through everything together.