Casual Desires is still being developed.
It's true that more time has been put into Rebel Duet lately. There's a few reasons for that, particularly its upcoming Steam release, and that I was feeling a bit burnt out with Casual Desires and having another project was my way of keeping busy in the meantime.
CD is important to me and, despite the long gap between Chapter 19 and Chapter 20, I'm committed to completing the game.
Sorry for my late reply; I wasn't on itch.io for a while, for I myself was working on some papers about chemistry, including a computer program.
I'm glad and very happy to hear that CD is to be continued with time. You really had me worried there that it had been put on the shelf (or should I say "into the library" by now) of potentially great games that were abandoned prematurely!
Keep up the good work, take your time and keep us updated every now and then please.
And above all: take care :)