Chad/Lucas/Charlie is a musician.
Hilarie/Peyton is in the audience during a concert.
They fall in love even though she hesitates in the beginning.
They spend the night together. But he has to leave the next day. She thinks he's gone but he shows up just for a goodbye kiss before leaving for good to tour. A couple of months later she receives a letter.
Song: Best days by Matt White
Hope you enjoy it. Keep the faith.