The beautiful female doctor is revealed to be the invincible warrior woman, Accel Girl S (Spark). Wearing a leotard that perfectly hugs her developed, gorgeous body, she provokes the lewd fantasies of malicious terrorists. The opposing forces, captivated by her appearance, see her only as an object. However, Accel Girl S possesses combat abilities powerful enough to deflect machine gun bullets, and she confronts vicious mutant monsters. Yet, in her first battle, she struggles fiercely and feels the terror of defeat. Overcome with self-blame, she flees—but soon remembers her duty as a warrior and resolves to fight once more to protect humanity. However, the battle takes an unexpected turn. The savage mutant monster Neptune does not aim to destroy Accel Girl S, but instead sets a trap to strip her of her fighting ability. As a result, Accel Girl S suffers an involuntary urination, and is then overwhelmed by a relentless wave of lustful assault. The terrorists succeed in completely dominating her, reducing her to a sex slave. This ending marks the tragic conclusion of her battle—a BAD END.