Yuu is in love with his friend's beautiful and sexy mother, Ayano, and goes to her house every day pretending to hang out with his friend. His sexual urges are so uncontrollable that he even sneakily takes Ayano's panties out of the laundry and takes a whiff of them. Then, one day, Yuu happens to see Ayano masturbating and takes a secret photo of her with his smartphone. Then he comes up with a despicable act...