Maou-sama, Retry!

The story centers on Akira Oono, an ordinary salaryman, creator of Infinity Game, an online game. When he plays it, he mostly plays as the character of Kunai Hakuto, the Demon Lord.

One day, he finds himself transported into the game in the form of his avatar, the Demon Lord. There, he meets Aku, a little girl he saved from the clutches of a demon. They then decide to venture together to discover this new world.

However, this might be a difficult task given that the Demon Lord is constantly pursued by religious authorities and fanatic demonic cults!