One day, I woke up only find out that Id become a Demon Lord, an individual accountable for protecting a dungeon. The planet Id been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with one another every day for the right to survive. I had developed no choice but to strengthen my dungeons defenses in hopes of living another dayor at least that was what Id thought. For some odd reason, I instead ended up spending my days in relaxation and bliss. This is Yukis story, my story. It tells the tale of how I spent my days after settling down in a dungeon with a self indulgent, supreme dragon girl and a young vampire.