once upon a nonfat frap (слэш)

[based on prompt by virgno in tumblr]
"Soulmate au where instead of having the first thing they say tattooed on each other, they instead have a random sentence tattooed that that person will say around them. And so you know it’s not just a coincidence when they say it, the tattoo stings and fades away. Person A going out with someone and just waiting for them someday to say the sentence they have, but then the barista at Starbucks says it instead."
[edited]