It's not the new chapter, it's a side story and I've read it about 2 or 3 months ago.
Think I would have liked it if I saw it separately, but when I got the notification that this manga maybe finally continuing, that excitement turned into disappointment when it was just another side couple(which would be better as omake chapters), especially as Ogawa Chise made such interesting and complex characters of the main couple
I'm disappointed as Hell too, still waiting for my Karino x Azusa plot... But hey! Yesterday my favourite CH fanfic got an update, so I've read it yesterday and I'll read it today, so maybe I'll feel a bit better after being so disappointed because of this so called "new chapter". I truly recommend this work - it's just awesome: https://archiveofourown.org/works/9251852
Jeez get back to the main couple already, it was bad enough the split personality brother and his pyscho lover was already sharing half of the story