Sehun is a careless, innocent student who doesn't know the dark sides of life. Meanwhile, Kai is a cold-hearted guy looking for revenge after his beloved father got killed by Oh Seung Ho (Sehun's father). How will he seek his revenge? NOTE: I'm not a native English speaker; if you decide to read this story, count in grammar errors and other mistakes! WARNING! This story contains gay relationships. If you are uncomfortable with that, please don't read it. Main Couple: Sekai Side Couple: Chanbaek