If you're talking about romance about the main characters, there still nothing till now maybe because the anime genre that has not romance on it.
I think maybe their but just some side characters.
But so far now there's nothing on it about the main characters of one piece just stay tune.
HERE YOU CAN FIND ABOUT NEWS AND RECENTLY COOL ANIME THAT HAS BEEN OUT EVERY SEASON:
http://www.animeultima.tv/
- THIS IS ONE OF MY FAVORITE ANIME SITE BECAUSE IT HAS A DUBBED VERSION ALSO OF ANIME'S, YOU CAN ALSO SEE THE NEWEST ANIME, MANY ACTIVE VIEWERS LEAVING COMMENT ALL OVER THE ANIME...
THIS IS ALL THAT COME'S COME TO MY MIND:
THEY ARE MY NOBLE MASTER
HIDAN NO ARIA
ASTAROTTE'S TOY
MM!
NYAN KOI
KOREWA DESU KA?
WELCOME TO NHK
GIRLS BRAVO
ZERO FAMILIAR
INFINITE STRATOS
KAMPFER
LADIES VS BUTLER
JUST SEARCH ON THEM IN THE NET TO FIRST SEE THEIR DESCRIPTION IF YOU LIKE IT OR NOT.