The Sidekick God

Random guy is transported to the Supreme God. He is given a chance to have some powers but he prefers not to have it. You ask why??because God was getting bored so he was chosen to watch over in time when God is on vacation but he wants to go on adventure... Eventually he accepts on condition that God will return in some years (probably some million years) .. ??God has been from who knows how much years.( millions ,billions...) don't know.... God RETURNS Adventure start.... Tag : maybe harem too..