Astroking falls victim to a treacherous trap set by the evil intergalactic organization "Karubadosu Clan" and is captured. On the brink of death, Astrobina escapes to an unknown planet, where she survives by borrowing the body of Earth Defense Force warrior Takanomiya Saya. However, the Karubadosu Clan returns to Earth in pursuit of capturing Astrobina. Fighting against rampaging space monsters and striving to reclaim Astroking, she struggles to defeat the beasts without him, gradually pushed into a desperate situation. Even after narrowly escaping, she becomes targeted by Defense Force member Kuroki Capp, who desires Takanomiya Saya's body. Then, before Astrobina stands Astroking himself... What fate awaits Astrobina?! [BAD END]