Yui was supposed to go on a trip to a hot spring with her husband Ryuichi and her father-in-law on their Yui anniversary, but Ryuichi was suddenly delayed due to work, so Yui ended up going with her father-in-law first. Although Yui was still a little awkward, as they explored the hot spring town and became closer, she suggested to him that she would wash his back in the bath. Her father-in-law, knowing that Yui was feeling lonely because of Ryuichi's cold attitude, accepted her feelings. Touched by her father-in-law's kindness, Yui revealed her beautiful body in the bath...