Sungyeol's entire life centered on one Kim Myungsoo. Since the first time they met, he kept chasing him in everything. Myungsoo was smarter, more handsome, more talented, better than him in everything. Sungyeol's obsession was more than jealousy. He just wanted to be better than Myungsoo at least once. Myungsoo's life constant was one Lee Sungyeol. He was perfect in everything but he hated changes. Sungyeol was his anchor to life. And then the incident happened. An incident that separated them. Sungyeol lost his goal, Myungsoo lost his fixed point. And L appeared. Sungyeol: Protect him, so he won't forget me, L.