Young teens, drug dealers and pimps.
Young teen MC saves teen female from abuse (family or foster home) by giving her means to escape the town. Think first to aunt's house and then by bus south.
I believe they get together in the future.
No aliens or space ships or do-over I think, just a male teen with enough wisdom to help. I believe he just moved to the small town recently.
There are a few do-over/alien stories in the similar area, but I do not think this is a do-over.