He entered the world thinking it was just another dungeon game.

So while nobles obsessed over romance and politics, he stayed underground swinging a sword at monsters for years.

By the time he finally returned to civilization, things had gotten strange.

The nameless knight in battered armor who clears impossible dungeons alone.
The mysterious man who saved a girl and disappeared, leaving only a red cloak behind.

People keep treating him like the hidden protagonist of some grand story.

Unfortunately, he still only cares about clearing dungeons.