I don’t get the last page

I assume Kyouko got into the elevator and then went down on purpose without waiting for Yui.

That sounds like a very lil shitKyouko kind of thing to do, certainly.

I don’t get the last page

I almost didn't get it the first time too. I thought the elevator gave out honestly x'D

But then i noticed it was because Kyouko got into the elevator without Yui. Now Yui is gonna either wait for the elevator or run down the stairs to make it to class on time. Btw I personally think it was Yui's fault for not checking the time, she was already up but decided to play video games. Honestly that was irresponsible of her.