I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too

A door to another world stretches out before a boy who's been brutally bullied all his life. This alternate reality grants him access to all sorts of things, like cheat skills and a portal that lets him travel between his old and new worlds! Can this class loser turn his life around back home...?

Keywords: elves, magic, high school, bullying, harem