There is a story about Yuri, it's called form of sympathy
This authors note is outdated, I think it’s almost 2 years old now. The publisher that she was originally with wouldn’t pick up A Form of Sympathy, but she has since moved on to another publisher, and it has just started being released at the beginning of August.
Wow, I can't believe that that went past me. Thank you so much for pointing that out! And now if you will excuse me, I have some catching up to do on another wonderful story ;-)
I can't believe the author's plans for Yuri's stories fell through. I was so looking forward to it.
Nevertheless, I really liked the story of the other two. So Yuri will forever be one of the best side characters.