Kasumi learned about this Kabe-Don thing, and how it's supposedly some sort of a romantic gesture, so she thought that Teiko might like it. So, on the weekend, she sprung one out of nowhere, taking her girlfriend by surprise. But then she felt very silly, because she's so much shorter.
I'm sure Teiko gave her many hugs and kisses after, to make Kasumi feel better. And to show her appreciation for the attempt.
If you like what I do, and want to see things a week earlier, or just want to help out, please consider supporting my patreon!