Kim Yora is a young lonely girl, who gave up on feelings. She thinks it's a useless thing and tries to live her life as far away as possible from people. But one day she meets a strange guy in her elevator that will change her vision of things.

A sudden confession. No hints to anything. The one girl who was my best friend just confessed to me. Who could judge me when I was thinking she might have just been joking? I played along. And, thinking back, I should have never done that. Right now, I will tell you my story. It all begins with her confession.