A teenage outlaw who grew up surrounded by wicked people enters the world of immortal cultivation. In this realm, humans and demons live side by side, evil spirits and ghosts roam freely, and the line between immortal and demon can come down to a single thought. Life and death are not settled by heaven. Set against that current, the boy pushes forward on his own path, aiming to rise and become a legend. Demon's Ascension is a 16-episode fantasy action adventure released as an ONA.