I wrote Seinfeld (1989 tv show) fanfiction.
Here is the summary:
They’ve spent a lifetime talking about nothing — until suddenly, it’s about them.
When a misunderstanding (and a very enthusiastic Kramer) convinces the world that Jerry Seinfeld and George Costanza are secretly a couple, the two reluctantly agree to “go along with it” for convenience — and, of course, for the bit. But what starts as fake dating for laughs turns into something alarmingly genuine, complete with awkward dinners, emotional confessions, and one surprisingly natural kiss.
As Elaine cheers from the sidelines and Kramer takes full credit for the match, Jerry and George realize their endless arguments might have been something else all along: affection in disguise.
Nothing But Us is a smart, funny, and unexpectedly heartfelt romantic comedy about timing, friendship, and the strange way love sneaks up on people who think they’ve already seen every punchline.
You can read the story on fanfiction archive:
https://archiveofourown.org/works/72912711