A lewd experiment was conducted at a certain graduate school. Aya was the target. Under the pretense of a molecular biology experiment, the professor forced her to masturbate and asked her extremely vulgar questions about her first sexual experience, her first period, etc. She ends up having sex with the assistant, but Aya endures it for the sake of the experiment. And it's a creampie. In the end, her sexual function is restored and she has creampie sex with the professor. Despite the experiment, Aya feels great. Don't miss the sight of a graduate student with a beautiful body and looks being toyed with.