Extra: After the plot

Mark is an ordinary human with his own set of flaws. His life is meaningless: he has neither love nor close friends. He lives only by comforting himself through the worlds of anime, manga, and novels. One day, his heart suddenly gives out, and he passes away in his small rented apartment. ​But this was not the end. Mark woke up in another world, in a stranger's body. However, this new life was not easy for him either. The place where he opened his eyes was some kind of dark dungeon. A "System" appeared before him, but this system was neither friend nor foe to him. ​The System's Message: ​"Host, congratulations! You have been reborn in the world of the novel 'The Great Hero.' However, by the demand of this world's deity, you must live in this dungeon for the next 5 years—until the main hero defeats the Demon King. Your reborn body was in a terrible state; it has been minimally restored within the System's capabilities. Do not worry, you are now in the dungeon's safe zone, and the most essential living conditions have been provided here." ​Now Mark was in the body of a third-rate villain from the cliché novel he had read. Worst of all, this body had now become blind, lame, and extremely weak. For Mark to finally breathe the true air of this fantasy world, he must survive inside this dungeon for 5 years.