It all started when Park Eunhee had accidentally bumped into a stranger at the airport. After meeting each other unexpectedly through a number of times, the two begin to form a closer relationship. Through meeting Son Dongwoon, Eunhee has learned that good things fall a part, in order for better things to be able to form together.

Jiyu didn't expect to meet a certain 4D dancer, and Hyunseung definitely didn't expect to meet a girl who got him to open up his reserved self, bit by bit.