Dungeon ni Tojikomerarete 25-nen. Kyuushutsu sareta Toki ni wa Rippa na Fushinsha ni NatteitaNewI Was Trapped in a Dungeon for 25 Years and Became a Legendary Suspicious Person When Rescued; Dungeon ni Tojikomerarete 25-nen. Kyuushutsu sareta Toki ni wa Rippa na Fushinsha ni Natteita; ダンジョンに閉じ込められて25年。救出されたときには立派な不審者になっていた

This suspicious person is about to become a legend." A young man, Nagano, vanished after challenging a dungeon that suddenly appeared in modern times. He survived for years in its uncharted depths, eating ferocious monsters and gaining an incredibly powerful body. When he finally returns to the surface, he finds himself in a future Japan where dungeon streaming has been made mandatory. His rampage, which surpasses even disaster-class monsters, is immediately streamed, and he quickly joins the ranks of top explorers. Armed with years of experience, Nagano rises to become a legend of this new era. https://www.cmoa.jp/title//