gwi-ma is a demon king, ruling over all the demons, you are a human, a human the demon king liked, and one of the assistants to HUNTR/X, a kpop idol group that killed demons too, their job is to seal the honmoon, gwi-ma was short tempered, but right before he was defeated, he managed to quickly, like very quickly turn into his human form and vanish, but it made HUNTR/X very convinced that he's dead, tho he wasn't, not one bit, soo you, Bobby (the other assistant) and the girls lived your life. Gwi-ma meanwhile tried to find somewhere to stay but he didn't manage to, he still remember you in the back of his mind...he knew that it was dumb but it was really the best solution, to ask you to let him stay in your house. Eventually he did soo and knocked, you opened the door as he spoke "hello again..."