Meeting him was the best thing that has ever happened to me. But I had to let him go.

I did not know to this day where everything comes crushing down, my whole life is a mess, my one and only best friend betrays me and the only guy who I accidentally fall in love with stops talking to me and break my rules that I was not supposed to break.

And it all started with a prank.

Cast: 

 Kim Taehyung as Kim Taehyung

 Chae Soobin as Sera

 Min Hyorin as Hyorin