Natsume Minami, a teacher respected by students and colleagues alike for her professional dedication. One day, the cosmic criminal Zacker arrives on Earth, colliding with the moon princess Serenada. The impact leaves Minami severely injured, prompting Serenada to possess her body and promise healing. Meanwhile, Zacker possesses Minami's fellow teacher, Hiruta, and begins acting in alignment with Serenada's goals. Zacker summons his control monster Gran to challenge Minami. However, after switching consciousness with Serenada and transforming into the warrior Androcross, Minami successfully defeats Gran. But the battle drains her mental strength, causing Serenada to temporarily lose consciousness. Seizing the opportunity, Hiruta captures Minami's body and forces her to drink an aphrodisiac, pushing her to the brink of endurance until she finally cries out. At that moment, Serenada's consciousness revives and corners Hiruta—only for him to reveal he has already injected her with a muscle relaxant. Paralyzed, Serenada is subjected to lewd torment. Though she maintains a strong front, Minami's consciousness invades her mind, causing confusion and making her unable to withstand vibrator torture, climaxing uncontrollably. Furthermore, Zacker's saliva spreads itching across her body, merging Serenada's mind with Minami's, driving her to beg for her own clitoris to be scratched. Ultimately, she allows Zacker to penetrate her. Overcome by depraved pleasure, Serenada writhes shamelessly, reduced to a submissive female dog. [BAD END]