Hoegwihan Mawangeun Chakage Sanda

A powerful Demon Lord named Zich Moore is defeated by the hero Glen Zenard, who, on his deathbed, asks Zich to be good if given another chance. Zich is reborn into his younger body and decides to become a better person. However, he struggles to understand what being good actually entails. His past as a demon makes it hard to grasp kindness, and old tendencies may hinder his efforts at redemption.