Vindkaldr

Arthur, age 26, is an avid fan of old dungeon crawlers since he was fifteen years old. His favorite among his collection is a game boy game called Vindkaldr, which came out in the early 90s. Upon defeating the final boss, he went to bed one night and ended up waking up as the final boss of the game.

In this new life, he has to learn the ropes of managing a dungeon as well as become friends with the adventurers.