The Dungeon of Black Company Vol. 8 (manga)

After taking down his corporate overlords and turning the Dungeon Black Company into a world-leading firm, Ninomiya has lost everything all over again. Now he’s marooned in the past, afflicted with amnesia, and stuck in a city where the only thing that matters is sheer power. For a totally normal Earthling surrounded by superhuman adventurers, that’s a tough break! Kinji’s determined to change the inhumane status quo in the city of Glory, and reuniting with his old friends just might be the edge he needs to make it happen.