Chae Rin believed in happy endings and forevers, but how much her heart says they are not true, her mind won't listen. She is from a rich family, but she does not look the least happy. The only person who brings a smile in her face is Kim Myung Soo or better known as his well-known nickname in school, "L".  But the bad thing is that she grew up, both of them did. Everybody has to grow up and that is when separation and goodbye's come. But, she doesn't want to believe it.