Kiss Me First (PCU Ice Storm)

Joining the insomnia thread at PCU was supposed to be harmless, a place to burn through the quiet hours with strangers who'd never know my name. A way to take my mind off the NHL scouts breathing down my neck.
Just honesty at 2 a.m. with a girl I only know as LittleTooMuch.
I didn't plan to fall for her. But somewhere between the late-night confessions and the things I'd never say out loud, I did.
Then Harlow walks into my life—guarded, beautiful, and my team captain’s little sister.
The more time I spend with her, the harder it gets to ignore the feeling that I already know her.
And if I'm right, I'm in a lot of trouble.

Tropes:
anonymous pen pal
he falls first
teammate's little sister
friends to lovers
slow burn