He wanted to create a realistic doll for his son, requiring detailed data on the female body. At that time, he noticed his mother, Yuri's, voluptuous body. GVH-815

The son, wanting to create a realistic doll, needed detailed data on the female body. At that time, he noticed his mother, Yuri's, voluptuous body. "Mom, can you be a model?" If it would help her son, Yuri agreed, shyly posing naked. But the son's exploratory nature wouldn't stop; to record various expressions, he began violating Yuri's body! And then Yuri gradually became addicted to incestuous sex under the guise of data collection…