Isekaigaeri no Yuusha wa, Dungeon ga Shutsugen shita Genjitsu Sekai de, Influencer ni Natte Kane wo Kasegimasu!

Ryouji has just returned from another world where he spent ten years gaining power to defeat the evil demon lord and is ready to go back to being a normal teen. Unfortunately for him, dangerous dungeons have begun to appear in the real world! While Ryouji still has his skills and abilities from the other world, something about these dungeons is still off, and he's the only one who can figure things out. While the world adjusts to the new reality of dangerous dungeons, Ryouji comes up with a plan to help wannabe adventurers while boosting his wallet: by livestreaming his trek through the dungeons!

(Source: Seven Seas Entertainment)