Kotaro remembers Yukari's words about defeating the "Creation King". In his hometown, a facility for experimenting on kaijins remains, and Bilgenia awaits them. Aoi and her mother are taken captive. Kotaro tries to rescue them, but a "Mantis"stands in his way. In the battle, he learns the truth and his hatred for Bilgenia grows, causing the Black Sun to manifest new powers.

Kotaro confronts the "Creation King" once again. That meant facing the abominable past and everything was supposed to be settled. In front of the king's corpse, Nobuhiko is informed of the truth about Yukari. Meanwhile, Aoi and Shunsuke succeed in escaping despite losing various things. But on their way home, after parting ways with Aoi, Shunsuke is surrounded by an anti-kaijin group...