Following a tragic accident, the game-loving shut-in Satou Kazuma was reborn in a parallel world. Though his dream of enjoying a new life as an adventurer in an RPG-inspired world and striving to be a hero didn`t come true, he managed to get by in his new world. He was joined by Aqua, the goddess who accompanied him to the parallel world; Megumin, an arch wizard who can only use her magic once a day; and Darkness, a crusader whose attacks always miss. And so, along with his party of girls who have extremely advanced powers but unfortunately can`t take full advantage of them, he managed to complete some quests here and there.

Then, one day, after Kazuma`s party saved the town of Axel from the mobile fortress Destroyer, a messenger from the capital came to tell Kazuma that he was suspected of the crime of subversion to the state! Where will the ordinary adventurer Kazuma`s life in a parallel world lead him tomorrow?!