Kazuma Satou, a high school student and hermit, finds himself seated before a gorgeous but irritating goddess named Aqua after dying a ridiculous and sad death on his way back after buying a game. She gives the NEET two options: go on to paradise or reincarnate in every gamer's fantasy world! Kazuma, who has chosen to start a new life, is swiftly charged with destroying a Demon King that is terrorizing communities. But before he leaves, he can choose one object of any type to help him in his mission, and the future hero chooses Aqua. But Kazuma has made a critical error—Aqua is entirely worthless! Unfortunately, their problems do not end there; it turns out that living in such an universe is very different from living in the real world.