I heard that this manga will end at volume 4. If that's true, it's a shame it hasn't been adapted into an anime yet and it's already ended.
Speaking of what this chapter is talking about, there hasn't been any series following this motif lately. It's like an old school, with a tradition of seniors accepting a junior as their younger sister, then addressing them like a rich lady like Onee-sama. The last series I watched that had this style was Yuri Is My Job, and it wasn't a real school, just a themed cafe. The author of that series has been drawing for a long time, since 2008, perhaps, at the time this motif was quite popular so she probably ended up drawing it accordingly, although the author probably thought the motif was outdated (that series came out in 2016) so she only used that motif as the theme of the coffee shop and could not write about a real school. As for new authors, I don't see anyone following this motif.