From Servant To The Strongest Human (One Punch Male Reader x DxD)

[Author on Hiatus] His parents dead, after an altercation between a devil and fallen angel claimed their lives he was taken in by the Devil King Sirzechs Lucifer, not as a family member, but as a personal butler who will serve the Gremory family for the rest of his life. After years of serving and a chance of escape...