Kikaku-gai no Danjon Kouryaku-sha, Jitsu wa Isekai Kaeri no Moto Yuusha規格外のダンジョン攻略者、実は異世界帰りの元勇者; The Overpowered Dungeon Conqueror Is Actually a Former Hero Who Returned from Another World

In an era overtaken by dungeons, hunters who make a living by conquering them have risen to prominence. After killing the demon lord in another world, the former hero Yuuki Rento returned tired of wars and vowed to spend his remaining life peacefully playing video games. However, when his friend discovered his identity and dragged him into the job of conquering dungeons, his overpowered abilities quickly become known across the world. "At this rate, I won't even have time to play my gal games!" Will the day Rento can finally enjoy a peaceful life ever come...?! A refreshing fantasy where the hero who once saved another world now dominates with his overpowered abilities!