Forced to Become a Dungeon Master, I Just Want to Show Off

"Can you go and kill all the invading monsters?" "No, I don't want to work." I just like a leisurely life——It seems that I must have been summoned to a different world Good news, I met a beautiful blonde girl and became the master of a castle. Bad news, "You have to protect our dungeon. If the core of the dungeon is destroyed, you will die too." In order to escape the fate of death, we can only solve this troublesome situation.