Isekai Kaeri no Yuusha wa, Dungeon ga Shutsugen shita Genjitsu Sekai de, Influencer natte Kane wo Kasegimasu!

One day, an ordinary high school student is transferred to another world. He raises his level in the other world, successfully defeats the Demon King, and saves the world! With his strongest status, he decided to return to his own world; however, in the world to which he returns, a new "dungeon" has appeared.