One piece : Friendship system...

Warning! The mc is Luffy, this will follow the plot exactly how it is with some changes like not going to get " go d ussop" or like skipping skypea...If you hate that then please go and don't criticize me for not having creativity cuz i really don't anyways yes harem first time doing that so who should it be? No one from the pirate crew though...okay maybe robin...