In a torture chamber hidden from prying eyes, the beautiful schoolgirl Rui Saotome is subjected to harsh yet pleasurable training that etches itself into her body. Wearing a sailor uniform, she is informed that once imprisoned, the discipline will never ease until her body is completely overwhelmed by pleasure. Captured and forced to change into a school swimsuit and bloomers, she is gradually transformed into a submissive flesh slave using various tools and devices. The process is filled with intense depictions that shake both her body and mind, rendering an incredibly realistic sensory experience.