Isekai de Cheat Skill wo te ni Shita ore wa, Genjitsu Sekai wo mo Musou Suru ~Level Up wa Jinsei wo Kaeta~

Yuuya has always been a loser, and after the death of his grandpa (the only person he had in his corner), he’s sure there’s no point even trying anymore. But when Yuuya moves into his late gramps’s home, he inherits a two-way door to another world. Access to this new realm might be just the cheat Yuuya needs to succeed in his everyday life.

Cheat skill level up (French)
I Got a Cheat Ability in a Different World, and Became Extraordinary Even in the Real World
I Got a Cheat Skill in Another World and Became Unrivaled in The Real World, Too
Isekai de Cheat Nōryoku (Skill) o Te ni Shita Ore wa, Genjitsu Sekai o mo Musō Suru ~ Level Up wa Jinsei o Kaeta ~
Isekai de Cheat Skill wo te ni Shita ore wa, Genjitsu Sekai wo mo Musou Suru ~Level Up wa Jinsei wo Kaeta~
Iseleve
สกิลโกงไร้เทียมทาน สร้างตำนานในสองโลก
异世界得到开挂能力的我、现实世界中也举世无双
異世界でチート能力（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～
異世界得到開掛能力的我、現實世界中也舉世無雙
이세계에서 치트 능력(스킬)을 손에 넣은 나는, 현실 세계에서도 무쌍한다