Battle Future F, having obtained intelligence about the secret organization Delos operating in the shadows, dispatched multiple members to investigate the sighting locations. Among them, the standout operative, Misu Gureisu—also known as Hibiki Arisa—sneaked alone into Delos' secret base, only to be captured and subjected to brutal torture by General Gerda, the monstrous commander. Enraged by Arisa's unyielding defiance, Delos resorted to a new strategy: brainwashing her completely. Meanwhile, back at Battle Future's headquarters, a new Misu Gureisu was appointed—Miyabi Reia, the second-generation heroine. Upon learning that her predecessor, Hibiki Arisa, was still alive, Reia set out alone to Delos' secret base. There, she finally came face to face with Arisa—the original Misu Gureisu. But the brainwashed Arisa, now under Delos' control, launched a vicious assault alongside Delos' soldiers. Reia and Arisa both transformed—Reia into the second-generation Misu Gureisu, and Arisa into the shocking Black Gureisu! Overwhelmed by her predecessor's power and unable to bring herself to strike, Reia was gradually driven into a corner. Sensing Reia's strong will, Delos began targeting the weaknesses inherent to women. The battle between the first-generation Misu Gureisu and Delos begins here… [BAD END]