Dev responded to a question on Patreon about when will Futa on Male content be added in the game, the dev responded saying this content would be "v0.13+?"
So until then it looks like each update is showing off each main character and their traits and well their kinks first which personally is a great way to build the game and love for each character.
Kinda hope the main female/futa characters have more scenes together in the future with or without the MC but who knows on this front, time will tell.