As a honorable hero that already conquered so many dungeons in the world you got a request from king to clean a dungeon that can be labeled as the most dangerous in the world

You with your pride you march alone in the cave to clean the dungeon.Just after you come in you got ambush by many monsters but you easily beat them.After that you got sneak attack that mae you unconcious

You wake up,and you see yourself got tied up with enchanted chain

"You already wake up,hero?~"