High school student Yu Kobayashi, who loves video games, goes to a job interview at the game company "Sprite Press" along with Itsumi Shimada, a senior at the same high school. However, the job they were given after successfully passing the interview was an outrageous part-time job: to travel to a parallel universe, a fantasy world, to develop a new game and save the world as " heroes ." Thus, with the help of the magician Bowman, Yu and Itsumi acquire equipment and undergo impromptu training. After being joined by the monk Jurion and the thief Alfreed, they embark on an adventure to defeat the Demon King as a heroic party.