I just watched the movie Swiped and now I kind of want to use it as inspiration for a line. (The other pb doesn't have to be a Noah Centineo either by the way! Both pb's are totally up for discussion!)
The two ideas I had were either my guy is a rich kid who finds out that the hot guy he goes to school with makes his money by escorting and being a sugar baby to rich older women through some app. While his clientele is usually just females, my guy's got a big enough crush that he's willing to pay just the right amount of money it takes to quickly become your guy's best customer.
-or-
My guy finds yours on an escorting app and realizes that it's his sister's or friend's boyfriend and he's been lying about how he makes his money. My guy confronts him and they strike up a deal to keep it a secret by also having one of their own.