GMA-087 - Bound training wife, sickly wife and a perverted hobbyist doctor who had an affair. A body writhing in anal development that isn't entirely unwelcome, Nonan Yui.

Yui and her husband lived together. She was seeing Dr. Sagawa, an associate professor at the university hospital where her husband worked, due to her frail health. However, they gradually became involved in an affair. Her illness had improved considerably compared to before, but she continued the affair in secret from her husband. Gradually, the two became addicted to strict punishments such as ropes and candles. One day, Yui welcomed Sagawa into her home after her husband left as usual. However, Sagawa was different from usual that day...