She was added when Selebus reworked the first half of chapter 1. That scene in particular was almost completely rewritten.
I don't remember there was ever an announcement like IN THIS EPISODE YOU GET TO FUCK XXX, so I guess it really is about if it's this girl's turn to get her story worked on in the development cycle, or main story progression reasons. Lust points don't seem to be a gatekeeper parameter to gauge when it's natural to have home base actions.
Yeah, the only time I can think of where the game in any way announced that you were going to make that kind of progress with a girl was the Onsen series with Chika, because she made it very clear what she intended to do once they're at the Onsen.
It do be part of the story, it's inevitable.
Personally, I thought it might be the Concerned god.
Regarding your third question Sel has confirmed there will be sex scenes involving every main and side character whether or not they are optional or not remains to be seen but he will fuck the the 5000 year old wizards and the mug monster.
Most likely Noriko or Miku, none of the girls jumped straight to sex.
The sex scene does not have to involve Sensei though. The last Rin/Otoha scene also counted as a sex scene.
Third questions
1st: Might be a dark horse, but I think Imani. Likely something that doesn't involve taking her clothes off though.
What scares me is that there are already 2 suggestive choices that kinda empowers that blackout possibility.
Yup. Honestly, I'm trying not to think about it too much.
If you mean penetrative sex, Miku, as she's the only you can generate Lust points for that hasn't reached that point yet, and it's safe to assume the other girls will be going through the same progression of manual/oral/penetration that most of the other girls have gone through, though the adult women won't need to do that. The other most likely candidate is Imani, as she very clearly wants to but keeps getting clitblocked.
I don't know if Haruka will show up in this update or not, but if she's on the list of who does, there's a non-zero chance that it's the threesome she requested last update. A Haruka/Nodoka threesome would be easy enough to arrange.
Selebus has said that it will happen. Not a fan of it, myself.
The progress tracker says there's only one Lust scene in this update, but that doesn't mean there can't be other non-avoidable sex scenes that we don't know about yet.
