Ok so I've read the previous posts there is Futa on Male, so the question for the Fem/Sissy content is its the mc turning another male or its the NPC that is turning MC into Fem/Sissy or there is both?
With a futa/femdom theme, it's pretty obviously going to be MC getting sissified, keeping with the theme. Futa/trans on male mc, fem/futadom & sissification of male mc go hand in hand pretty well.
Personally not my thing ofc. If you want want male PC sissifying male NPC, there are almost none from what I've seen so far.
Male on futa is more available, almost more than futa on male, thanks to many vanilla harem games sole trans characters. Yet to see a Trans focused game, with multiple trans characters, going the male on trans route tho. Most go futa on male like this one.
VoidPilgrim (dev):
Advise I give to every dev of games having futa/trans content is to specify futa/tran on male mc or male mc on futa/trans since most people have different preferences in this matter. This particular game's OP was very nice tho, managing to convey the game & it's themes pretty well, helping people to find or avoid it just reading it. Good job & Good Luck