Older Buffy home visiting from college and spends time with younger William. Sex on a field?

I'm looking for a fic I read FOREVER ago it seems. All I think I remember is an older Buffy home on College break. Her and a high school William or Spike were old friends. She spends time with him and they end up on a field of some kind, maybe a baseball diamond or football field. They end up sleeping together. I think it's maybe only a couple chapters long. Also, I my be way off, and mixing fics...but I feel like I remember something about fireworks or stars being in the title. Thanks guys!

soldierswifeee
Is is "Starry Nights" by Fauvistfly? If so, it is on this site.

Tara

That's it! Thank you