Its about a male protagonist who is living in a city. He proves himself worthy by sucking of a futanari in a Futa Club i think?
there are many females(perhaps futas) in this city
Eternal Futa Woo [Gala Sanctuary] perhaps?
You can play as male or a femboy/trans. Indeed, I believe a world dominated by futas. The futa will become your mistress. It's more of a demo / proof of concept ATM.