The official release date for volume 23 is on the publisher site now, btw. 9/19, that's a day after YJ chapter release. We'll finally get a Saki and Nemu cover probably, and Nemu's official birthday. Wonder what it will be, my guess is if there's no national sleeping day in Japan then it will be the first July birthday, another sleep-related Japanese thing showed me that ZZZ can look like 777, so I bet Nemu will be on 7/7, unless theres another number pun thing you can do with like "guu" or sleeping in general. It'd be nice if us Decemberbros can be thrown a bone too though.