It all started when Miyuki's mother-in-law died, her father-in-law became mentally depressed, so her husband took him to live with him. Even so, he still constantly skipped meals, always sitting in the room depressed. This time, her husband had to go on a business trip, leaving only Miyuki and her father-in-law at home. Because she wanted to encourage her father, Miyuki said that she would do whatever he asked. In the evening, when passing by his daughter-in-law's room, his father-in-law accidentally caught Miyuki masturbating. Unable to resist her beauty, he went in and begged her to fuck him for exactly ten seconds. His father-in-law was extremely obedient, he only fucked her for exactly ten seconds and pulled out his cock, leaving Miyuki who was feeling extremely uncomfortable with his cock. Since that time, his father-in-law has become happier, he also began to eat all the rice and be full of vitality. His libido also recovered, he wanted to fuck Miyuki, she refused at first but the pleasure he brought was different from her husband's. This was the first time she felt how wonderful sex was. And since then, she has also been more proactive, wanting to be fucked more by her father-in-law, wanting to be satisfied by him for her long-held sexual desire!