A project featuring a perverted masseur working at an inn who gradually turns regular massage sessions into sexual services for ordinary female guests. This time, the guest is Iina, a 21-year-old office lady who enjoys hiking on her days off. The masseur says, "I'll properly loosen your muscles and improve your lymphatic flow," but slowly directs his hands toward her more sensitive areas. Initially cautious, she gradually gives in to the pleasure, eventually leading to full intercourse. Amidst covert hidden camera filming, her genuine, uninhibited reactions are captured in detail.