As someone said over on Patreon yesterday, it is impossible to study and ship at the same time. This leaves Claire in a considerable dilemma!
It's pretty clear that Brun likes spending time with Clinton. You can see this from the way her face lights up in panel 1, which is probably when she sees him entering The Secret Bakery. Was meeting up with Clinton the reason why she dragged herself, half-conscious, out of bed this morning? I find myself wondering just how long those two have been dating
without knowing it!
In panel 3, Claire obviously sees the way Brun and Clinton are smiling at each other and was able to do the math. So, the time has come (in order to maintain her self-image) to feign being a somewhat-prima-donna student and make a sudden, tetchy exit and leave the lovebirds to it. I sort of hope that, before she leaves, she lets Brun know that there is no reason why she cannot tell Clinton if she finds him attractive and, indeed, she is allowed to ask him out.
EDIT
*Squints* Oh! That person on Patreon was quoting Jeph's footer! I don't always notice them, hence the confusion.