For some reason I didn't even notice Yumeji stuck in Neiro's (and then Chieri's) blouses at first until some students shouted out that he's still stuck. I guess the humor this chapter just wasn't for me.
Honestly, this new girl is a pain. Bringing in a stock-standard, off-the-shelf tsundere (who merely happened to be a giant girl) into the story wasn't a very comfy thing to do. She changes the mood this manga previously had for me, I hope she stops being so adversarial soon.
Slapping Chieri's hand and offer of friendship away, even after losing a contest she herself agitated for, rubs me the wrong way.
Not cool.