Eighteen year old Jooeun and sixteen year old Junhong aka Zelo have been friends since they were little. They know everything about each other, well not everything, but they about each other’s likes and dislikes.

Zelo was known to be the biggest player in their school. Jooeun was already used to it. At first, she did care but as time goes on, him not listening to her, she stopped caring.  

What if one day a new student transfers there? He and Jooeun started hanging out together, leaving Zelo out of the picture and with a new feeling he never felt before: Jealousy.