They Said There Was Nothing Left to Teach Me, So I Came Down the Mountain

Sung-jin, a boy raised by immortals, descends into the mortal world. But the world has already become overrun with demons and evil spirits, while the martial world is on the verge of explosion over the legacy of the Heavenly Demon. Armed with immortal techniques and inhuman strength, Sung-jin becomes the youngest demon hunter in history— and in his wake, demons, martial clans, and all the rules of the world begin to collapse.