I really liked the story and how you typed it out and such but it went a bit too fast. So like focus on the details, like how they are feeling instead of instant FLUFF. Or just like? I am not that sure because you zeroed in on the fluff and you did a good job with that, but think of all the ups and downs with like the happy, and the angry parts.
All I am saying is that focus on the one part instead of Happy, blush, blush FLUFF. It is a good format, but you could go for maybe a bit of sad moods. (bring out their personalities)
You did a great job on the story though!

I never watched the movie, so I'm lacking some informations :D But it sounded really good!
And the end...
"pulling Kageyama in for another kiss and his dad came in." :D Lol :D
I really like it, truly!

I can just imagine his dad walking in and either laughing like crazy and shouting "I told you so!" or freakig out and shouting "I was joking! Oh my god!"

Eheheheheh, so cute! Pfft, I've been texting you as if you're up at 9 AM... Anyway! I've never seen The Notebook...

Is it bad I kind of wanted kageyama's father to walk in at the end and be like 'ha I knew it' anyway it was a sweet story. Good job.