Giantess planet / shrunk planet

Welcome to my first story!!

In this section i will provide the rules of the wworld, some background, and whatyou can and cannot add,

Id make an interactive story but i really dpnt want to pay money to do so, if anyone is inspired by this work of (art?), feel free to make an interactive story using my background/foundation, just credit me somewhere i guess.

Right, lets begin:
So, in this world, the X chromosome carries a special behavioral dna(idk), which makes cells 100 times smaller then the cells of women who only have Y chromosomes,

So what this means for the stories, is that women are completly normal, and have a casual life with thetiny men, since theyve been small since the day humans existed, this means that although women are bigger, faster and stronger, they mostly care for their little companions, men also go to schools with women, and there are special hallways and other thing to make their life better,
But dont think this means women dont abuse their massive strength over men, some girls in schoolsjust grab tinies and store them as pets, toys, and whatever else, and younger girls in preschools and such have a habit of just bringing a boy home as a friend and just accidentally killing the boy,

With that, you can place your addition in ANY period of time, since men have always been tiny, you can do a modern giantess, a madival knight, or maybe a world war soldier with her little hubby in her pocket, the choice is yours!

Thank you!