Jiyong: a normal highschool student, with normal friends and pretty average grades. In his opinion he's nothing special and is good at keeping under the radar, but what he doesn't realise, is that he's anything but normal, in fact he's not even human. There is a monster inside of him, bursting to get free and there's nothing nobody, not even Jiyong, can do to stop it. That is until one man, brandishing a golden sword and gleaming white wings, appears in Jiyong's bedroom promising to change their lives forever.