Maou-sama, Retry!

Akira Oono, the manager of the MMORPG Infinity Game, is a regular working adult. After fifteen years of development, Oono decided to permanently shut down the servers. He unexpectedly awakens at the stroke of twelve in the body of the middle-aged Demon Lord from Infinity Game, Hakuto Kunai! Shortly after his enigmatic journey, he sees the demon Greole pursuing a young girl named Aku. Hakuto kills the monster with ease, but he is still worried because he doesn't recall making the girl or the demon. Hakuto resolves to look into the possibility that he might not actually be in the world he created. Hakuto sets out on a quest to discover just who or what summoned him to this fantastical world, bringing Aku along as his guide and traveling companion, all the while unleashing chaos and destruction in his wake.