In that last little panel on page 17, I swear she was thinking about a rectal thermometer
Also Senpai has the MOST BORING ROOM I've ever seen. He's an artist! You'd think he'd put up a couple of his drawings or paintings. There was one frame on the wall but we didn't see what was in it.
I just noticed after rereading for the 11th time! Naga on chapter 11 when Senpai shut the door in front of her, she looked like she was about to break it down if he didn't open it