A secluded hot spring inn far from civilization hides a secret: its baths are actually mixed-gender. With few guests, it's not uncommon for women to bathe alone. Taking full advantage of this situation, bold men approach and seduce unsuspecting women, leading to spontaneous sex on the spot. Hidden cameras are secretly placed in the mixed bath, covertly capturing forbidden footage that gets quietly leaked. Women who know their images have been recorded almost always give in to further advances. The fifth installment of this popular series brings an exciting new development.