After a soccer match, six friends return to their homes to play a charming RPG‑style video game. One of them scores the winning goal, another narrowly misses as the goalkeeper, and the remaining four cheer each for their side. When they finally defeat a boss, an odd object materializes before them and pulls them into the game’s world. Tomoru (the scorer), Mio, and Dai find themselves alongside Professor Galileo, who explains that he is the creator of the game, called *Eureka*, and that he was inadvertently drawn in as well. To return to their own world, they must complete missions that appear in various regions of the game. So when a mission app pops up, they face new challenges that will test their teamwork and resolve.