One afternoon, while Riko was cleaning the garden, her husband, who had finished work early, returned home with his co-worker, Murai. Murai had heard that Riko was beautiful at work, but his co-worker's wife, Riko, was even more beautiful than the rumors suggested. And her co-worker husband said that the two of them were already sexless. Murai half-jokingly asked Riko to have an affair, and Riko didn't seem completely opposed...