The Possessed Grappler

One day, Ji Cheol-Min, a perpetual loser, suddenly gained the ability to see ghosts. However, since he knew the ghosts would follow him if he let on about this ability, he always pretended not to notice. But one ghost found out about his ability, and that ghost began to follow Cheol-Min around. That ghost is none other than... a jiu-jitsu monster...?! (Source: KakaoPage, translated)