Revenge. Sehun wanted revenge on his past best friend who had crushed him like he was some bug. He wanted to torture him and make him know just how much he had lost. And thus, his plan was set into action. His first mistake was letting his fury take control of his mind. His second? Not listening to his heart that was pleading him to stop..something was wrong. And what was his third mistake then? Even he didn't know; not yet.