Because Mayuki's husband moved to work, the two came to live with their parents-in-law. Her father-in-law is a man full of energy, his libido and sexual ability are also very high. Every night, her parents-in-law made love very intensely, moaning, and the sound of the bed shaking so loudly that Mayuki and her husband couldn't sleep. She was stimulated by the wild frenzy of her parents-in-law, but her husband was physiologically weak so she never knew the feeling of satisfaction. Mayuki, who already had a strong sexual desire, now witnesses her father-in-law's huge, strong cock pounding hard on her mother-in-law's pussy, making her burn, her crotch getting wet unconsciously. And since then, the thought of wanting to have sex with her father-in-law has grown more and more. That thought accumulated until one day when her mother was away from home, she immediately took off her clothes and rushed into the bathroom to the surprise of her father-in-law. He tried to stop her, but her heat made her unable to think about anything, she just wanted to satisfy her swollen pussy, wanted to experience the happy sensations that her physiologically weak husband couldn't bring...