Female student Yuzu Kitagawa. She gets along well with her classmates and leads an ordinary school life. With hopes of advancing to university, she is deceived by her homeroom teacher and university professors into becoming a subject for research experiments. A university specializing in the medical field expands Yuzu's anus and inserts foreign objects inside her, voyeuristically watching her writhing anal! She is made to reach ecstasy as a penis is thrust into her wide-open two holes!
