A real girl?... Then what is she right now? GASP
A tomboy non-feminine girl (though I think she's just fine and adorable the way she is), but whom her crush thought of as a boy for years and years. I think the point is that she's a girl--of course--just not a "girly girl" that Jun can stop thinking of as just a pal. (Though of course we know he's already noticing, if in some denial.)
She wants to be seen by Jun as a girl. So, here are the besties to the rescue. She won't keep this up. This isn't the real Tomo. It's shock-value Tomo and Jun will blow a gasket.
When misaki got Slammed by the ball, i thought "Oof"
So did Misaki probably, judging by the "Guf" sound effect coming out of him. lol
Probably