Adventerer X Centaur Companion

So basic idea is that an adventurer (male or female) is paired with a female centaur going on various quests and artifact hunts to earn gold and fame. I'd enjoy a bit of world building and action to be involved, most anything is welcome kink wise but the main one I wanted included is that the adventurer uses the centaur as their mount and particularly enjoys using her as a lewd pack mule as in they will store items inside her pussy and ass. Nothing too outrageous things likes Gold bags, potions, scrolls(in scroll tubes), trinkets, ect. Had the thought that she also has a specialized horse cock dildo that's hollow allowing the storing of weapons that is placed in her ass.

I'm open to suggestions and encourage a bit of discussion regarding details and such. If this seems like something you'd be interested in feel free to message me.