Oh God it's starting to coming up all together. Like,
1. The story always takes place inside the school, it's so rare to get talk about anything aside from that. We know almost nothing about Nene's family, her life outside the school, (or any other characters, basically). But now we are going to shown about supernatural outside the school, that were always taken care by ours truly, hot, suspicious, and powerful president fuckin Teru
2. As many had said, Kou's last statement definitely rise up some new (or old?) Theories: 8th mystery Nene. Logically, I won't even consider that, because why would she giving up her normal life just to become one with a ghost? But her life is basically all tangled up with far shore, and remembering AidaIro's track record *cough DMLD *cough, I don't doubt if this route will be taken.
Also why Kou is calm??