Watch as Class Rep's mom is also revealed to be a closet otaku of the same long-running series/franchise,
since the original series did exist 50 years ago, based on Marei-chan somehow knowing that song.
This chapter alone is the biggest surprise this whole year.
I'm happy of course, Otoha's declaration to live together and everyone noticing how romantic it is. And forgetting senpai at the clubroom is funny.
But it's just that nobody could have seen this coming. I remember a few times Chiyo knew some geeky/otakuish terms but besides that there was nothing hinting to something of this scale.