Because it's too early to tell what'll happen.
What will happen? Vote now on your phones:
A: Her wandering friend is the love interest
B: Her student is the love interest
C: The cool beauty part time teacher is the love interest
D: The cute glasses wearing teacher is the love interest
E: There is no love interest. Everything will be subtext and the manga will be highly divisive because of it.
Based on how she was acting and the title of the story, I'm pretty sure the answer is A. I think the idea here is that there are two main romances that the story is going to focus on. The student's crush on the part time teacher, and the teacher's hopefully mutual love with her traveling friend.
I am not sure if the former will end up successful or if the answer will be sometimes you have to let go of your first love and move on, but I am very hopeful that the second will be successful. If, you know, they're not just outright already dating.
Cause seriously they have a room together in their apartment and the traveling friend is constantly sending her momentos, even just cool rocks she finds, and the teacher is looking at event he cool rocks with adoring expression because it's from her. This feels like 'already a couple' kind of things