A man named Yui Tenma visits his father-in-law's house due to some legal proceedings regarding its transferral. Despite feeling comfortable around her husband's kind and considerate father, she unexpectedly finds herself being watched during a sexual encounter between them. The next day, when they are alone together, the father insists that he can satisfy Yui better than her husband does and forces himself onto her. Initially resistant, Yui eventually succumbs to pleasure under the relentless advances of this virile older man... Note: Content may vary depending on the recording method used.