Kurumi's mom remains an outstanding X-factor lol. She has to come home at SOME point I assume. Maybe she comes home while Naoi is over and reacts poorly or something but who knows. And on the other side of things, Naoi's dad being who-knows-where is pretty terrifying. He knows where Naoi works, probably where her school is, knows what Kurumi looks like, and he might try to track down the mom now that he's been officially served with divorce papers.
Mine also remains pretty mysterious, but clearly possessive of Isanuma. Seems like they're heading towards a second school shit-show lmao. Kokoro also knows what Kudou is really like, so maybe she could preemptively get Azuma and Akane up to speed, which could keep Kudou from getting the whole class on her side. Could go a lot of different ways lol
Naoi definitely feels guilty about hurting Kurumi in the past (she looked horrified at what she'd done last chapter pushing Kurumi against the fence for example), and this chapter she didn't mean to hurt Kurumi when she grabbed her wrist, but she does and has a poor reaction to that as well. She compares herself to her father quite a bit which is really unfortunate, perpetuating the abuse cycle as others have pointed out. Even waaaay back in ch.13 she asks Kurumi if she thinks she resembles her dad
The longer she goes without telling Kurumi about Kudou the worse the misunderstanding will get, naturally, and either way Kurumi won't be happy if she thinks Naoi is seeing Kudou behind her back, or if she finds out Naoi beating Kudou up as a coping mechanism, which is
probably what Naoi is planning to do to Kudou next time, though we don't know 100% for sure yet that that's her plan. Seems pretty likely though!
My reading comprehension might be dead because I thought she called the new baby Manaka. Nice kanji though (愛叶).
I thought that could be the case at first but it doesn't look like Naoi's mom is very far along, so it'd be a bit odd to have a girl's name picked out already, and to then tell Naoi what it is. I think she was pausing and then began to address Naoi as Manaka (which makes sense since it's her mom) but Naoi didn't want to listen to anything else she had to say at that point and cut her off