I think this should be R-13, but nothing too bad, there are some implied stuff. Please help me decide by commenting about this.
NamixZoro - I know what I want by ~CappuccinoBird
As long as they can remember, Zoro and Nami never did see eye to eye about things.
OP-BigBadRedRidingHood- by ~vtophya
In fact, they were like Red Riding Nami and Wolf Zoro, always fighting. Of course, Red Riding Nami was far from helpless.
Nami and Zoro by ~Wakamoley
She’d take on Zoro any time!
Nami vs. Zoro By Joouheika by ~LoveOfZoNa
They would fight about every little thing imaginable, there was always war happening between them.
Zonami cute by ~amayaryuu
If you want to read more, open in One Piece: Who's the Best Guy for Nami? Zoro! (There are a lot of pics so it may take a while to load.)