That was a cute way to confess, but for some reason I can't help but think about that other girl from page 12. Just standing there, on the other side of the book case, thinking "Oh gods, they're flirting again. This is so awkward. Wait, are they going to— Quick, make a noise!"
So, well colleges in Japan don't normally have uniforms, there are some that do. Particularly women's colleges. So I'm going to pretend the student is a 4th year and sensei is a new hire fresh out of school...