Wow, new characters after a while of it just being the two of them. They probably won't stay long though since they're not looping. Like Aoi's older sister or Class prez Yoshino.
"We're a bit numb to pain"
Is one heck of an understatement, when for them death has become a convenient shortcut to skip to the next loop.
So they're finally taking advantage of the looping like a cheat. Their memories and skills learned carry over to the next loop, it's just the physical state of their bodies in stasis. I assume they spent a few loops actually practicing before forming this band.
I'd like to think that her getting pissed off is because he and whatever he's brought to her life is actually special to her, in contrast to how he states that he's nothing special and tries to put even more distance between them, with that "it could've been anybody else and you'd still get along well" speech of his. It makes her especially mad because it ignores the chemistry they've had that made it all work for so long.
He takes their dynamic for granted, but nobody is actually forcing them to stay together: they could just as easily go and live the loops separately without ever talking to each other, but we know they chose to stay together every single loop, doing things as a pair.
Yeah, I think it's her who's falling in love first at this rate.