A mysterious group captures Mizuki, strapping her down as she endures intense experimentation. Blending scientific curiosity with sensuality, inventors Minami and Makoto use resonant vibrations upon her supine body, pushing her to ecstatic limits between pleasure and submission. Her spirit remains fiercely unbroken, craving the dual release of bondage and discovery as her captors explore her profound, quivering responses amidst the strange machines.