While out buying a game, a shut-in named Kazuma Sato mistakes a tractor for a speeding truck and rushes in to push a girl out of the way, dying from acute stress reaction as a result. In the afterlife, Kazuma is greeted by a goddess named Aqua, who offers to transport him to an RPG-like world in order to battle against a Devil King. Given the option to choose an item or ability to arm himself with, Kazuma, annoyed by Aqua's attitude, decides to drag her along with him to the town of Axel. With Aqua unable to return until the Devil King is defeated, the two earn some money to register as adventurers, with Kazuma assigned to a rather generic Adventurer class while Aqua is assigned as an Archpriest. The two then proceed to spend the following weeks working a carefree life as laborers, before eventually remembering that they need to do some actual adventuring.