Newlywed office lady Reiko's daily commute on a rural bus suddenly turns into a nightmare, transforming into a direct route to a pleasure hell. Each morning ride becomes the start of new horrors. Overwhelmed by fear from her first experience, Reiko's soft, voluptuous body is subjected to endless days of training. Gradually, her mind is dominated, turning her into a submissive under tentacles. But when Reiko discovers the true identity of her tormentors, she is plunged into even deeper despair...