It's up to you to decide if you were already living here or came from another universe etc, but you are in a macro/micro world there are people (anthropomorphic and homosapien, and even anthropomorphic versions of animals from media like Pokemon, Digimon, and more) small and people large ranging from so many different highlights, some macros are larger then skyscrapers, some micros are small as grins if rice or even smaller, the point is in this world even a macro can be a micro to a macro larger the them