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.