
The uke did want to be an omega and have a child but his body wasn't that of a usual/normal omega so he lost hope. So he wanted to be a kindergarten teacher because he likes kids (and to have one of his own). I have no problem with him developing into more of an omega and that changing a bit of his lifestyle because it was depicted that it was what he wanted. The problem is him losing his job (though he got it back) for it.
The uke is too kind to have forgiven the seme that easily. Author could have added more to show the seme made tremendous effort to be forgiven (because we know they were to end up together anyway).

It may be common sense to think that Ai is a normal girl who gets hurt but the author's so good at making her seem to be that weirdly invincible otherworldly being that even I subconsciously believed so.

My thoughts? Ai has some serious issues so severe I'd believe it whole heartedly that Ai was truly as invincible as she comes across, if only for just a moment. Of course, not without a cost. I mean, Ai pretended for so long that she had essentially embodied her act as the loving, shining, invincible liar idol to the point where she avoided saying she loved her own kids who she clearly wanted and cared for because she was afraid she would lie. Does this make sense? I don't know. Basically, something something mental block something something she definitely has psychological developmental issues because she was, what, sixteen when she had her twins, so just think how rough a childhood she had lived something something trauma made her the way she is, basically gaslit herself to this point and now she can't say "I love you" to her children. AI is insane, I think that's wonderful.
It's Yelan