At this point I'm convinced Mimori is behind everything, and that's all her elaborate plan to groom Haruka and the others into becoming her personal sex toys.
There was never much mystery to it, it was more of a thriller/psychological, and yeah, this arc is almost like a break arc from that, but dunno if it'll continue with this direction up till the end
Lol, she's not going to be able to walk after this. Also, lol, we finally got to see 3 of the other 4 girls for a bit; it's been so long it's like they stopped existing for a long time. XD