My pleasure
Hope I can help~
This is actually really nice and sweet! I do have a few suggestions to improve flow and give the reader a better taste of what they're getting into.
I think Akiro, a rumored delinquent reads better.
Is being a beauty all that Hinata's known for?
I would recommend using character identifiers which are not related to their physical appearance. 'Rumored delinquent' opens up a much better possibility for character conflict than 'sleeping beauty'.
I would break this up in a couple of sentences, I think. And add something specific about this encounter of theirs. The 'character meets character and falls in love' trope abounds in romance stories, so I need to know what sets yours apart from the others 
2nd blurb:
This is beautiful, but redundant in the context of your blurb. It doesn't add anything to nor tie in with the rest of the blurb.
Nice conflict set up, though I would love to know more about Dave than his passion for the guitar. She is an openhearted teen who's maybe a bit reluctant about love. He's kind and sincere and plays the guitar. She has a conflict. He does not. I hope that makes sense?
3rd blurb:
This is short and to the point! Characters, check! Conflict, check! Stakes, check! My only suggestion would be to perhaps flesh it out a little, in case the story is on the longer side. Reading this, I am expecting to dive into a short story or novella. But that's just a minor suggestion 
Hope that helps!