Protector (Changlix)

Changbin is a hellhound that has been given the mission to protect Felix, a university student who has no idea about the supernatural world. Changbin accepts this mission instantly. So, he watches the boy he has to protect like his life depends on it, keeping himself at a distance where he can see Felix but also doesn't get himself into trouble. Felix happens to be looking out the window and after a moment, he had spotted the hellhound. He is freaked out about this but shrugs it off for a little while, assuming that it is a security guard or a boyfriend waiting for their partner. But, the more he notices Changbin around, the more creeped out he is by it. Felix wants to confront this person, but before he could, he is ambushed by numerous different supernatural creatures. That is when he finds out who Changbin really is. What would Felix think of this? Will he accept his new protector? Or will he take his changes and reject his protector?