I will show the Gods, The glory of a Mortal God (Danmachi fanfic)

Arthur Valentine is a delinquent who beats up anyone who angers him, but unknown to anyone deep down he was a hardcore otaku who would binge anime and do power scalings on characters. But recently he had developed a bit of a waifu crush on a certain blond hair pseudo-goddess, and a mentor complex from a one-eye fire force grandpa. He is given a choice to continue with his normal life or a life of adventuring.

Watch as a delinquent is given the powers of both overwhelming strong pyrokinetic and shows orario what a god in mortal skin can do.
( 3 Years before cannon)