Bamui Miro

One night when it was raining cats and dogs, Seung-Jo, who was looking for a place to shelter from the rain, ended up at a well-known wealthy house in Gyeongseong. Hui-Un, tthe young master of the place and he was surrounded by ghosts and monsters. Seung-Jo has the ability to get rid of them and while helping each other they start getting closer...

(Source: Mr. Blue, translated)