That's because kuro is author favorite character. Iirc it was mentioned somewhere in the afterword (??? And serious-senpai dialogue) that kuro is author favourite. Even iirc at 2nd popularity poll (1000th chapter celebration) was held with the top rank getting their own special chapter story...
So we're into "Big brother accidentally know that his little sister is a Vtuber, so he also join and become new Vtuber himself" trope fest now. Iirc there's already like 3 manga with the same trope as that
Oh no, did emma realize about the actual unemployment rate, job hunting competition, and insane entry level job requirement then decide preschool is useless anyway?
As sad as if it's indeed getting axed, I'm not sure how author would prolong the story. Both of them are pretty much conscious of each other, no competing heroine for prolonging interaction and progress, the MC started thinking about going to a university (which sometimes mark the end of romance...