Reiko, a wife, is invited by her husband, Takaaki, to go on a hot spring trip. When she arrived at the inn and immediately went to the bathhouse, the man in charge suddenly came in and grabbed Reiko from behind, groped her buttocks and devoured her anus. Reiko ran back to her room in a panic, but another manager was waiting for her in her room, and Reiko was raped in the anus that even her husband had never touched before. Her husband cut a hole in the shoji screen and peered in.