Could've very well lived without that chapter (Hate Harems etc. and kinda didn't really fit the previous chapters, since usually you'd expect mc to get jealous)
I guess I understand why some people don't like the chapter cause it was weird. Didn't seem too bad to me though.
I think the point is that zombie-fan-chan is eccentric in her hobby and this is how someone with that kind of obsession would act. I don't think it was necessarily a sexual thing although it might seem that way. Someone mentioned ntr but that's a stretch imo. I think she's just a zombie-obsessed weirdo.
The one nice takeaway from this chapter is that Ema is the only character (including Hinata and Shion themselves) that realizes Hinata and Shion are dating. I love gyarus.
It would be nice if they address the soft NTR going on here in an upcoming chapter though. Otherwise the tone shift in the relationship dynamics is a bit much.
i hate where this seems to be going tbh. love triangles are so overdone at this point that they just kill my interest in a manga.
if the author has no other ideas for the story it should have just ended last chapter