Some Sweet (Vanilla) Sweat indeed!
Still, there's no way he would come to hate her just for being sweaty...In fact, I'm sure some actually really like that! Including him.
Also in a way, his coach was unintentionally being a wingman by forcing him to hide with her in the locker.
Once in a while, a 'smell fetish' is fine, too. A girl who consciously decides to "take responsibility" for getting her boyfriend rock-hard ... yep, she's (future) wife material. Finding hurdles heavy? ... guess what, Coach-kun: you're too old for this shit. And it was perhaps the blessings of one or more Gods Of Vanilla that ensured that no *koff-koff* "interruptions" took place when Toshi and Miya 'got down to business'.
Still, there's no way he would come to hate her just for being sweaty...In fact, I'm sure some actually really like that! Including him.
Also in a way, his coach was unintentionally being a wingman by forcing him to hide with her in the locker.