In a distant future where Earth's resources are depleted and humanity's progress has halted, society is divided into 'Units'. Living in Unit 74's 'Night Town', where electricity ceases at midnight, is young Hajiki Sanada with his family. Central to this tale is the enigmatic GAD, capable of reshaping matter based on living beings' emotions. By chance, Hajiki activates a GAD, summoning a colossal Tekkoudo dubbed Lightning. As he encounters others with Tekkoudos, Hajiki wrestles with the realization that they share a common bond, sparking a quest to navigate this newfound connection.