After the attack, Aoi and Kotaro find themselves in a strange relationship. Meanwhile, Bilgenia, who had obtained video evidence from Kawamoto, the wanted man doesn't tell Dounami about it. In the midst of all this, the protest that Aoi participates in develops into violent clashes and chaos. Then suddenly Nobuhiko Akizuki appears, insisting on the rights of the kaijins and rousing them to action.

Nobuhiko, together with the kaijins he gathered, tries to recover the former Gorgom. An old friend visits him and informs him that the Kingstone is under Aoi's care, so he goes to Kotaro... Meanwhile, Aoi is happy to see her father, Hideo Kawamoto again. However, Aoi is suddenly pursued relentlessly by her father who has turned into a kaijin. But she is saved by an unexpected person.

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.