"Do you have a girlfriend~?"
Yes.
Did she not expect him to be popular?
Instantly forgets her sour mood the moment he looks her direction.
Teacher is at least polite about it.
"I'm just a regular high school girl."
Nah. An adorable high school girl who's already caught the man she wants and who wants her.
Just realised?
"You cool with that? You've got tons of rivals!!"
Nah. Tons of wannabees.
Her being proud of knowing his weakness is prime example of how adorable she is.
"You get a three-day date with your boyfriend!"
I'm not sure she realises how hard she's wingmanning.
Are Shogi pros that much of a celebrity in Japan? Or is it super amplified in this manga for relationship dynamic reasons?
I always assume everything is amplified in manga. Just look at a normal family anywhere and compare it with family drama stories of the same culture. Doesn't matter where in the world, fiction likes to exaggerate.