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

異世界でチートスキルを手にした俺は、現実世界をも無双する ～レベルアップは人生を変えた～

Yuuya Tenjou is a meek, bullied middle schooler tormented at school and at home, with only his late grandfather ever in his corner. When his parents throw him out and leave him the old man's house, Yuuya discovers a doorway inside it that opens onto another world called Argena. There he gains powerful abilities and levels up against monsters, and those gains carry back with him — reshaping his ordinary life in the real world. This manga adapts the light novel of the same name.