HWIYEONGGEOMJEON

Eunho, the strongest in the yokai realm! He gained the chance to become a human being after losing the woman he loved and killing countless yokai. After passing the gate of reincarnation by accumulating merit for a thousand years to abandon his immortal body… He became a human being, held a sword, and learned martial arts for the first time. But this is very… easy? (Source: Kakao Entertainment Corp., translated) — Description from AniList community (anilist.co).