ACZD-134 Anal Extreme Expansion Ryo Document Anal Fist Insertion Education Record Anal Fist Achievement Record Through 4 Days of Expansion Development

How far will the anus open in 4 days? A record of anal fisting achieved through expansion development. The test subject, Ryo, is a true anal masochist who has anal pleasure structure not only physically but also mentally. She was the perfect subject for this challenge, as she had been longing for anal fisting in search of stronger penetration. This is a spectacularly expanded document that uses a female anal enthusiast as a test subject.