Kei and Yuri are at an airport, escorting some guys to the plane, but the guys get shot. The girls pursue the assassin, who turns out to be a beautiful but very skilled woman named Lady Flair. After failing to capture her, they notice that she has been apprehended by the Military Police. But Kei doesn't buy that idea, and they storm the military base later, where they are developing giant spider-like robots.

Waldess has infiltrated the Siren space station! As he takes over broadcasts and declares his conquest of the galaxy, Yuri and Lilly are sent with the 3WA to fight Waldess. But Lilly decides to quit in the middle of the mission, leaving Yuri alone. Kei must make a decision on the future of the Lovely Angels, while Lady Flair comes to a confrontation with her past.