Didn't play the game yet but if this is true, maybe rewriting the story so MC is the futa and we ntr other party member, demon etc to get more powerful harem.
Maybe add humiliation by having the harem "ex" to do some task so they can see the girl. Or even better, invite the "ex" to join the deeds but only watch.
Sorry if opinion seems too rude for someone not playing the game yet but I just want to play this kind of version more.
I get where you're going with this and that would be fine, but the problem is that without being the mc Jack has even less of a presence. And since this is supposed to be an nt game, you need at least the primary pc to be nt'd in someway. Making Kana the mc would work for this, but making Sayako the mc wouldn't have enough of an impact.
Btw the mc is the primary pc. You actually get to control different PCs in this game at times or at least see their perspectives. (Which means you can already be the futa sometimes.)
I've played a few games like that though and it's certainly a fun perspective. A halfway point would be making sure Sayako is the secondary pc, having the second most screentime...which is sort of already the case.
