...There is in fact nothing beyond subtext this work, so I'm removing the "yuri" tag.
I'm begrudgingly adding a shoujo-ai tag to replace it so that this gets to it's intended audience, but it doesn't actually really deserve that tag either.
"yuri" isn't a demographic tag; just because it's in "yuri hime" does not make it yuri.
(The story is great, though, FYI)