notice them?
i meant
survive them, to get to the roof itself and not vanish
just noticing the reset could be a lot of things, they are just aware, they moved a little bit closer to loving him but not actually loving him yet, learning to accept a dark awful part of sensei and choosing to keep interacting with him and not hating him for it. (which both yumi and tsuneyo did and what makoto is currently doing) all of these are steps to this form of 'love' in all its toxicity and beauty
edit:
i still dont like this one...
not enough stabbing damn it, will admit my problem with it is more a personal issue than a flaw in it
and the horrible twisted reason why sensei isn't reset and makes it to the roof is ....
he fully accepted and loves the worst parts of himself and when that level of narcissistic love gets shattered, he resets, he is regularly called a narcissist too and this explains why some sensei's made it through a few resets according to maya
considering the name of the game too

it fits disturbingly well...
edit:
added a bit to this and cleaned it up some