Mai is seen protecting a young boy against a large Sand Phantom. Several days earlier everybody had been wondering what they were like as children. That night Haruhiko finds a box of items from when he was a child. The next morning Haruhiko wakes up a child version of himself with no memory of being a teenager. He heads to his old junior school where he believes he is in first grade. He is found by Kurumi who returns him to the club...