超難関ゲーム世界に転生したら、ポンコツ最強魔王様のたったひとりの部下としてダンジョンをつくることになった (Associated Names)

I was deemed a failure by the goddess and ended up reincarnated into the world of a game known for its insanely high difficulty, as the final boss’s Demon Lord. My skill is Dungeon Master, and my race is Demon—clearly, I’m on the enemy’s side, not the hero’s… Lost and confused, I encounter an overwhelmingly…