I loved this a lot. Yuri herself is very cute, the gender ambiguity of the protagonist (so I could, perchance, have hyper-yuri with Yuri) was very appreciated, and the whole throughline of "the hyper is clearly more concerned with themselves than the world, but also doesn't want to hurt anybody" and "we serendipitously made human society a utopia as a side project to getting bigger" are both very good and I love them. I also love my very, very big fox wife.
This was so cute!! All the tooltips and little details about how intimate and loving the whole thing is for both parties... It made me want to start writing hyper stuff once I was done. Great work!