Great to see more!
But i also smell a love triangle or something..
I dunno, I'm leaning more towards "Yamada makes a big thing out of something Kase doesn't really think is one."
Though it could be a good thing. I mean, imagine Yamada thinking she actually stands a chance to really lose Kase, and not just losing her but to an old sempai she still apparently has contact with. It could be what pushes her to seek out a horticulture college in Tokyo (or wherever it was Kase was going) instead of just going with her mother's dreams. Making real effort and decisions to keep in touch with her and stay with her.
But I digress. It was a cute three chapters, and it keeps confirming why I really love the series and why Takashima Hiromi deserves a spot amongst the great yuri masters.