Help about my Fanfic: Mc x Stussy

Please Help. I want Stussy one of MC woman, give me an Idea for the plot as to make it not force.

Here the headups: Mc currently have Robin. Mc was adventurers type who want to find the truth of one piece word. Mc has the ability of mind manipulation but I don't want make it force like make her love him through mind manipulation. Timeline meet her 1506 -1507 based on Ohara Timeline.

I don't care if it's make Au but not force in relationship. So please help me give some idea for this plot idea.