UEE - UEE's first love is Joo Won but broke up and few years later they meet again. She then met Jeong Hoon who was with her through thick and thin after breaking up with Joo Won.But she still has feelings for Joo Won and had a hard time forgetting about him. 

Joo Won- Joo Won still loves UEE after the break up and searches for UEE a few years later .

Kim Jeong Hoon- Known as Jeong Hoon, loves UEE very much as she's his first love.Omona! All of them are first loves to each other. Gets involved in a love triangle with UEE and Joo Won .