After dying a hilarious and pathetic death on his way back from buying a game, high school student Satou Kazuma finds himself sitting before an obnoxious goddess named Aqua. She provides the NEET with two options: continue on to heaven or reincarnate in every gamer's dream; a real fantasy world! Choosing to start a new life, Kazuma is tasked with defeating the Demon King who is terrorizing the world of KonoSuba. But before he goes, he is allowed choose an overpowered item to aid him in his quest, and the future hero selects Aqua herself out of spite. But Kazuma has made a grave mistake; Aqua is completely useless!
Unfortunately, their troubles don't end here; it turns out that life in KonoSuba is a far cry from most fantasy worlds! Faced with no social security, no workplace safety & hyper-aggressive sentient food, the duo must first struggle to survive instead of going on thrilling adventures. Indeed, their misfortunes have only just begun!