Manga Hisshou Dungeon Unei Houhou

I was relaxing and having a wonderful life when one of the carefree days a woman came to me and offered to become the manager of the dungeon. At the same time, she said that the goddess would help me, and I had no right to refuse. Why? Yes, because girls cannot be denied, especially beautiful ones. But no one explained to me why I should give up my comfortable life in order to guard some demons and mysterious creatures of the dungeon. However, here I am, already working on problem solving. They promised me everything to show and teach everything ...