RCTD-107 A world where anal certification has become commonplace - Yua Imai

In 20XX, security vulnerabilities in fingerprint authentication and face authentication were questioned, and "anal authentication" using a knuckle hole that was never shown to others on a daily basis appeared. There is no extra mosaic by wearing the front sticker! An obscene and practical system where you can see a lot of butt holes in everyday situations! Also includes flatulence and asshole gaping anal vaginal cum shot!