Kono Kamen no Akuma ni Soudan wo!

Game loving shut-in Kazuma Sato's life as a young schoolboy in Japan abruptly comes to an early end...or at least it was supposed to. When he opens his eyes, though, he sees a beautiful goddess that offers him a once in an after-lifetime chance to be reborn in a parallel world. The catch is that the world is violent and threatened by a growing evil! Fortunately, he can choose any one thing to bring with him. So he chooses the goddess, Aqua! And so his adventure with his gorgeous companion begins--if he could just get enough money and food to survive, keep his goddess out of trouble, and avoid grabbing the attention of the Demon King's army! (Source: Yen Press) Note: Includes 15 prologues, 6 interludes, and 21 epilogues.

After Wiz wastes all the money Vanir made from Kazuma's patents on high quality Manatite, Vanir is forced to take up a job in consulting to pay the monthly rent of the shop. Aqua couldn't fall asleep, and decided to invade Wiz's shop to inquire about her and Vanir's past. Various characters consult Vanir for help.