Sunhee and Kai have been friends since they were tine. They've always played together and called each other boyfriend and girlfriend. They even have their own dancing world that belongs to them alone.

But as they teenage years slowly comes to an end, things begin to change. Kai meets new people who he will make as friends, and they are taking all of this attention. Sunhee can tell his feelings have changed. But can she guess at the true reasons behind it all?

- From their first love and first hearbreak.

;;;;