Her father-in-law lives in an apartment in the next town over. Kanna, a serious wife, has never had a good relationship with her husband's father, who loves alcohol and gambling and has a rough temperament. When she and her husband visited her father-in-law's house, she sighed at the sight of his dilapidated room, where he continues to lead a decadent lifestyle. The following week, she visited her father-in-law's apartment alone to deliver some government documents. However, her father-in-law, aroused by her defenseless female body, erected his thick, hard, and powerful middle-aged cock and approached his "son's wife"...!