Actually tho, real talk for a second. There was more than just that scene that screamed yuri end this episode. There was a lot of subtextual stuff that's there that - if they are baiting - would bait the...um...types that pay more attention than most.
When Shuuichi had trouble in class, Kumiko didn't really care. When she saw him trying hard and practicing, she was moved and determined she wanted to get better herself, but it was done in a way you could have replaced Shuuichi with %band_member and it have the same reaction. Except Reina.
She's still the main person who chases after Reina. Her friends now give her the push to go out to her way friends would for your crush. Nothing makes Kumiko lose her tact and get excited the way she does.
And with regards to Reina, not much new was shown subtextually last episode (they've kinda done all that over the last 10 episodes), but one important note is how in the end, she cared what Kumiko thought more than anyone else, including Taki-sensei.
So if we are being baited, fine. They set the hook good enough to catch a whale.