While performing a mission, he was forcibly interrupted by his grandfather and teleported to Japan. What exactly is there here? What makes grandpa so anxious? Pursuing the sealed memory and the power to break the seal, the girl suddenly becomes the key to saving the world! After wiping out the eight major families, he received another order: There should be no more superpowers in the world! Except her! Those with other powers must surrender their powers and have their memories removed; those who refuse will be shot without mercy! In order not to implicate him, the girl decided to leave quietly again to eliminate other superpowers scattered around the world. The girl was also silently watching and protecting him. Time flies by, can they be together?