I'm in chapter 5 I believe. Some spoilers ahead.
Just met Sora and I love he can be a dominant femboy from what you answered me some days ago. I haven't unlocked any scenes with him yet but I'll make my masculine MC in appearence as submissive as possible to him.
Even though he is a guy and this content gets overlooked when directed to men I'd like some ass and feet worship from the MC to Sora. Besides the obvious scenes of rough anal sex I believe will appear with Sora. The MC only passive in my case if possible. I don't want him active in anything. Him fucking someone or getting a blowjob is something I don't like seeing, like what happened with Nimeria recently. I chose all the submissive options and dice rolls with rerolls, I expected her to be only dominant yet she gave me a blowjob. Her manipulation and feet content was great though. I just hoped she would only recieve pleasure, and the pleasure the Mc recieved would be from humiliation/ degradation and serving her only. The handjob with edging was also good. But that blowjob wasn't submissive in my eyes.
Regarding Serin her content is great. I think you should use some Ai tool, LORA or something to fix unclear eyes in some Ai images. I know it should be a lot of work. And the content is great so far, more so in images where there is only one character where the Ai is better. Making scenes involving two or more the AI starts showing it's flaws. Yet some sexual scenes images with two characters look good. I just wished many of them were more polished.
I chose the Serin futa path because I wanted her as dominant as possible and I had the intuition that if I didn't choose futa I wouldn't get an equal number of scenes with her pegging the MC with a strap-on than futa on male ones (although I do prefer strap on pegging than futa)
Regarding NTR I think you missed an opportunity for dark NTR with the mage Gairos. I found it strange, him as an evil and asshole character would make an excellent and taboo antagonist for a dark NTR story where he takes over the Mc's family and/or love interests and corrupts/wins them over/enslaves them sexually and emotionally progressively. Even the demons with their tragic past caused by him and his discrimination would work great for a NTR story where a character like Nimeria falls for his worst enemy. Dark Ntr is hot for a lot of us so I think it's a shame you didn't even include an optional route for him.
Tharos and the girls (I hope to see some lezdom) are my options for NTR so far. I don't like Seryk so I discarded him. I don't like male demon sexual content much, I don't like Seryk being nice for a Ntr antagonist, and his constant "bro" is cringy IMO. But that's just a personal preference where I detest when people use the word "bro" to call anyone they see without even knowing them.
The game is very good and promising. I'd like to see the MC become king in the submissive path only for him to be a puppet for the character we chose to dominate him in the game. For example being a nice king outwardly but behind closed doors (and maybe more openly in an ending) being dominated by Serin, Sora or Nim. For example a good scene in my eyes would be him giving a grand speech in the town square while Serin as the queen stands besides him while touching his ass sneakily. And after the speech is done they return to the palace to their room where he kneels and kiss Serin's foot and gets fucked in the ass.
I'd like to see findom content in the game also if we chose so. Some girls asking to be spoiled and progressively asking for more and more money, gifts or stats and skills by some method. Financially dominating the MC to the point they demand him to thank her/them for using his or the kingdom's money. Or humiliate and degrade him for being a beta that gives away his precious treasures or the people's taxes that should have been used for a better quality of life of the citizens and instead is being used to sustain luxurious and expensive tastes of Serin, Nim or Sora. The findom could also be rewarding him in dominating ways for giving them gifts, money or territory. And him geting turned on by spoiling them and losing everything to them/her/him. Being a King in name only while being a sexual and emotional slave to the girls, a girl or Sora would be hot. And then maybe lose his title as king also to the dominant counterpart, although the power dynamics wouldn't be as fun if that were the case.
Of course findom can be implemented earlier. He doesn't need to be a king to be financially dominated by some girl or Sora.
That are some of my aspirations for the future. More degrading/humiliation content if we choose the submissive options all the time. More giving pleasure and less receiving (only anal and from the humiliation or degradation or the submissive nature of giving). And more dark Ntr. Even though now it's too late and I believe you didn't want to make Gairos Ntr content there should be some dark ntr content in the game. If the ntr is from wholesome bulls or not humiliating it loses a lot of impact. It should come from an asshole antagonist that badmouths or bullies the MC and makes the girls badmouth him too for it to be more impactful. A big betrayal with degrading and humiliating corruption is hotter for many of us who enjoy that more traditional type of NTR or darker. Not the netorase one, the wholesome one or the "he cheated so I cheated on him" which is boring and justified IMO.
So to conclude I just hope in the submissive path we can at least have an ending where the MC is rock bottom submissive. And not just a wholesome ending with only gentle domination. And at least an optional dark NTR path were the MC loses everything. My comment mostly turned into a long request list but it's a great game so far. I'll try to write a 5 star review that talks more about the game one of these days and maybe subscribe to Patreon in the future.