I only now noticed that in page 19 there's cameos from Shuukan Shounen Hachi (another manga by Eiji Masuda), with Mikeya (with fox/wolf ears) is holding Hachi (in the form of a carp) in the fountain, Myako is watching them (and of course she has cat ears) and finally Handa is above in that balcony/open rooftop, Handa doesn't have any stand out feature except if you consider... she is drawn curvier here maybe?
And of course there's a Jitsu Wa cameo with Nagisa looking surprised at Handa and vice versa, wonder if Nagisa had any changes as an alien who wouldn't be in disbelief like the humans upon the UFO crash (to boot, it's from her planet), but maybe the reason she is wearing the cat head is because she is actually human sized again due to the effects and in her goofy personality she still hides it despite all the craziness going on on earth.
Also, just through my first reread of this manga, but truthfully I still think what the actual fuck was this chapter, like the first time I read it.