Do Kyungsoo has a huge crush on Kim Jongin. Belonging in a popular circle, Jongin plays it cool and return Kyungsoo's love with cold treatments in order to keep his pride and status. He has noticed the elder's affection for him a long time ago and decided to do nothing about it. It's not that he hated it, quite contrary, Jongin loved it. 

Nevertheless, the day that Kyungsoo got tired of Jongin's behavior finally came. Kyungsoo instead turned his attention to Jongin's best friend who has been flirting with him ever since his confession to Jongin. And things had turned upside down for him.

http://www.asianfanfics.com/story/view/997321/love-me-again-angst-romance-chansoo-jealousy-hunhan-kaisoo