Having a futa transformation followed by a character emission through cumming is a fantastic idea, hope you do more! A quick idea for a story involving that could be a group of women grow dicks thanks to a witch/demon. They are forced to have sex with the witch where they eject their personality into the witch's womb, swelling her belly. The witch presses on her stomach to absorb the womens' souls, fusing with them. After this the womens' empty bodies get spiral eyes as they are mind controlled to be the now fused witch's futa slaves.
