"potter! i heard you got a secret admirer!" the voice laughs. ALSO ON AO3 WITH CORRECT GRAMMAR AND MISTAKES: "Secret Admirer" by "blissfcll"

It started off as a prank on the last year of Hogwarts, after the war. But it lead to a steamy hour in the shower... which lead to a hot day, to a hot week, to a hot month... but they are only bump it bros, right?