Even past her thirties, she remains a stunning and charismatic beauty known as a "bijo." By day, she teaches at a night academy. Her true identity, however, is Powerwoman Seiran Yonekura, a galactic detective hunting the cosmic demon lord Delvil. The grotesque incidents caused by Delvil begin to infiltrate her school. To protect her students, she fights fiercely against Delvil's monsters. But Delvil brainwashes her students and sets a trap for the Powerwoman. Monster tentacle whips mercilessly lash her big tits, throwing her composure into chaos. Recognizing her mature, sensitive body as her weakness, Delvil targets her erogenous zones, driving her into frenzy with relentless sexual attacks. The Powerwoman screams in ecstasy, climaxing repeatedly in a lewd, helpless state. Against her will, she is forced to accept Delvil's semen deep into her womb. As a result, the Powerwoman falls into a fate of becoming a flesh-bound slave... [BAD END]