Amid all the mayhem, Yoko's baby is safely delivered, and she names the mysterious boy "Riku." However, as the Self-Defense Forces encircle the area, suddenly another child possessing similar powers to Riku crash lands right into the fray! His surprising declaration? He is in fact Riku's older brother! This announcement brings more questions than answers. What is he after? Who, or what, are these two mysterious children, and what role are they here to play?