It's time for the final showdown! An ordinary middle-school student's life takes a thrilling turn when he encounters a powerful mechanical being in this exciting FULL COLOR manga series for fans of My Hero Academia and Spy x Family. The situation in Kita-Kagami City has gone from bad to worse. Rogue Mecha-Ude are increasing in power and will stop at nothing for world domination. Hikaru and Alma have been badly hurt, and the ARMS scientists aren't sure they can save them. Even the Kagami organization has been made vulnerable by deep betrayals. As evacuation alarms go off, and with the fate of the city and perhaps all of humanity at stake, it's time to put aside differences... and just maybe save the world.