After defeating a foot soldier of the villainous organization Gema that appeared in the city, Riris Factory, the sole female warrior of Sonicman, receives a desperate report that her students are under attack by the monster Jestba—and immediately rushes to save them. Hearing their cries for help from afar, Riris quickly races to the scene. Transforming into Sonicman, she confronts Jestba, but her signature Sonic Saucer attack fails against the monster's powerful tail assault. She is choked, overwhelmed by electric shocks, and suffers critical damage. Worse, Jestba exploits her acute hearing, bombarding her with devastating ultrasound waves. Despite her desperate resistance, Riris loses consciousness.
Captured, Jestba attempts to extract the location of the Sonic Station from her, probing her mouth with a tail that morphs into a grotesque oral appendage, seeking to melt through her armor. Yet Riris remains silent. Enraged, Jestba decides to break her will by using her students as hostages, resolving to turn the heroic warrior into a submissive woman. He invades her groin with his tail, stimulating her intimately while filming her humiliation for her students to witness. Further degraded, Riris is forced to endure the monster's assault, her body leaking semen from her violated core. But then—something changes within her. A surge of power erupts as she reawakens, fully re-armed and ready to fight Jestba once more! [HAPPY END]