Katelyn did some shrinking experiments with her guinea pig Billy. He has shrunken to the size of a little fingernail, or even a bit smaller and hopes for a reward from Katelyn for his brave mission. She sends him on a journey all over her body, now that he's so small that she could be a whole city to him! He explores every inch - yes, even her pussy. She allows him to dive into her hole and you can see her from the inside while you accompany Billy!