I had this idea a while ago. I requested it from notapotato, but he seems to have vanished for medical reasons. So I'm gonna put it out there for anyone looking for ideas.
A teenage girl (A) who works retail is frequently approached and chatted up by another girl (B). B is completely and obviously head-over-heels for A, and A has feelings for B but is way too nervous/closeted/scared of commitment/whatever to do anything about it. Noticing this, when B's birthday rolls around, her parents kidnap A for use as a present, in the hopes of getting a romantic relationship going.
Preferably, it works.