I think either mc was cursed or wanted a certain power; I "remember" a scene where he accepts to work as a shaman (possibly) in exchange for a sword/cursed object; over a long period of time he needs to exorcises the son(or brother) of a gangster (maybe); son/bro is possessed by a demon that would try to seduce/have sex with everyone, brother included (most definitely not related); demon says the soul of the son/bro is long gone, can't remember if we get some of his old consciousness peeking through.
OR scratch the first part, and for some reason mc was immune to the demon advances so he was hired to keep him away from having sex/consuming the servants.
I feel like mc had other stuff going on and all of this was just a side plot.
I think either mc was cursed or wanted a certain power; I "remember" a scene where he accepts to work as a shaman (possibly) in exchange for a sword/cursed object; over a long period of time he needs to exorcises the son(or brother) of a gangster (maybe); son/bro is possessed by a demon that would try to seduce/have sex with everyone, brother included (most definitely not related); demon says the soul of the son/bro is long gone, can't remember if we get some of his old consciousness peeking through.
OR scratch the first part, and for some reason mc was immune to the demon advances so he was hired to keep him away from having sex/consuming the servants.
I feel like mc had other stuff going on and all of this was just a side plot.