Hisshou Dungeon Unei Houhou

On one bright and leisurely afternoon, an unexpected visitor calls at the protagonist's home: a beautiful woman who asks whether he would consider managing a dungeon, with the full support of a goddess behind him. His answer is an immediate refusal. When she chides him—surely he cannot simply turn his back on someone in trouble, least of all a beautiful woman?—he brushes the appeal aside without hesitation. The whole endeavor sounds far too bothersome, and besides, why should the responsibility fall to him of all people? He is perfectly content with the comfortable life he already leads, and throwing it away strikes him as nothing short of foolish. And yet, with a resigned sigh, he finds himself giving in. The task before him is laid out plainly: journey to another world, become a dungeon master, oversee the dungeon's operations, and somehow resolve the problem troubling its circulation of Mana. He accepts the assignment in principle—though one pressing question remains. Now that he has agreed, how exactly is he supposed to accomplish any of it?