Kazuto Sato, an unremarkable high school student, discovers he has the world's most contradictory ability: he gains experience points and levels up by doing... absolutely nothing! In a world where others must train rigorously to increase their powers, Kazuto becomes stronger through meditation, napping, and perfecting the art of inactivity. As his unusual ability draws attention from friends, rivals, and a mysterious organization hunting ability users, Kazuto must decide if protecting the people he cares about... is worth getting off the couch!