phenomen a book

"You have been chosen for the [Game of Dungeons: DxD Edition!]" When a bimbo Goddess summons you to a dungeon sandwiched between the supernatural world of High School DxD and the deadly Monster Realm, what''''s a normal guy supposed to do? Well, becoming a Dungeon Master, scamming the Goddess into being your servant, and using every loophole in the system to profit would be a nice start.