Sensei wants to keep the shameless flirting to a minimum during class. Sharing books is bad enough, soon they might even be borrowing pencils! It's a slippery slope!
Yeah, I was not being clear at all. You're totally right.
What I actually meant was more something related to being nice because ofcourtesy and not because you actually like that person. In the first image you sent there's an example of that: Yamada was being nice to him, but he answered with well... Being a stupid horny teenager.
I also think that Yamada was too centered on the fact that Ichikawa was sitting really close to her that she didn't mind the guy.
PD: I just realized that Yamada has two moles on her neck, kinda like a vampire bite. And I don't know what to do with that information. that girl is a middle schooler
@tarojiro
The literal translation is "I'm good" with an implication of "good enough" - as if she meant "you could have just asked me".
We went with "I'm right here" to make this nuance clearer.