Tales of Aeolus the Outrageous

After being accidentally killed by the god of Earth, NET. Hishaku Arisu is offered a chance to reincarnate into another world owned by the god- which also happens to be the inspiration behind the game, Kingdom Crawlers that he's the best at- on the condition he agrees to be the god's champion, and help him save his world through world domination. This is an offer he can't refuse, and the offer he's been waiting for, since he's bored anyway.