The Space Monster warps closer to earth, and Nono suddenly departs with the Solar Defence Force, seemingly vanishing from the system. The empire decides to use Earth as a weapon to destroy the final Space Monster to ensure their survival. Meanwhile, Lal'C, for the first time, delves into Nono's past; how she learned to idolize "Nonoriri" and the man who found her in the depths of Space. She and the remainder of the Topless prepare for the Space Monster's arrival and the timely intervention of Nono, who now becomes the mega android DieBuster. However, frustrated with Nono's departure, Lal'C batters "DieBuster" in a fit of rage. Just as she is about to land a finishing blow using Douze-Mille's reformed components as a Buster Machine, her Topless powers suddenly expire. "DieBuster" attempts to attack the Space Monster, with no effect. However, the monster vaporizes "DieBuster's" hands. Dix-Neuf moves on his own to help Lal'C access the true cockpit in his brain, activating his true form, and coaxes Nono to come out of the disintegrating "DieBuster" and fight with her. With the two girls together once more, and Dix-Neuf's new powers, they defeat the final Space Monster with a Double Inazuma Kick.