Izuku is going to have Ace and Sabo as brother while his time with Zeff and will have a part of sanji past and bit of luffy. I decided to call the Baratie by the Going Marry for later emotional reasons of my plot and I am going make him 177cm tall and give Izuku second gear and (fourth gear) it will be know as third gear since he not rubber man and can't expand his body but those power not quirk will come later like haki also can only be achieved by breaking your limits and having all your bones like the joint in the pinky toe so most quirkless people who try. There will be some one piece character in the story coming up. Ace dad won't be Gol D. Roger but will become a D. cause of Izuku same for sabo and I will give the heroes bounty by the villains similar to one piece.
Now to the harem
Ochako Uraraka
Tsuyu Asui
Momo Yaoyorozu
Kyoka Jiro
Mina Ashido
Toru Hagakure
The two genderbend shoko and katsumi
Itsuka Kendo
Pony Tsunotori
Mei Hatsume
Nejire Hado