Document porno: Hatsujô-zoku o hagu(1973)

At the sea, men lure out women, and women lure out men, and they devour each other. Who is truly stronger and more erotic, spending all day naked? The sea is overflowing with young men looking for adventure. And a guesthouse becomes a place where they can be lured in. In a guesthouse with no privacy whatsoever, brutal sexual acts unfold in front of the camera. What will be lost at the end of a mindless relationship aimed only at carnal desires...