We have Kasumi calling Sakurako her wife, we have Sakurako thinking about how her and her sister have similar taste in women, now we have Kasumi fishing candy of Sakurako's mouth with her tongue. We probably won't get a proper confession or a proper romantic kiss but I have seen one shots get the Yuri tag for less.
Seriously? If that's the case, why can't Yukiko-sensei publish in a more yuri-friendly magazine? That's sort of depressing to know.
A few yuri artists have had a problem with this, due to the current dearth of yuri-focused magazines. Losing venues like Tsubomi and Hirari hurt a lot, and even Yuri Hime has changed focus a bit.
Hmm. I wonder if that's why Hana and Hina was cancelled from Monthly Action, a magazine that doesn't exactly focus on Yuri. And Morinaga-sensei clearly was not dialing back the yuri. And Kobayashi-san Chi no Maid Dragon is in the same magazine and it seems to me like the yuri keeps getting dialed back in it.
Edit: I miss Comic High. It wasn't a yuri publication, but it at least was friendly to the yuri that was published in it. Examples include: Girl Friends; the completion of Sighs, Kisses, and Cherry Blossom Pink; the start of Hana and Hina; Age 15; and others.