I guess there's no more content after the scene where Varrick hugs mom?
As an NTR connoisseur, I thought I'd leave some feedback.
One thing that immediately stood out to me was that the isekai narrative was entirely superfluous and actually worked against the NTR narrative. This persona for the MC feels like a much better fit in an isekai harem scenario where he takes over the body of a weak chump like the "herb boy" and turns him into a chad (or at least a succesful perv using his hentai logic). The way he is written, it doesn't feel like he would be the type of person that should be getting cucked. He seems like a witty and sarcastic guy with a roguish personality. The herb boy, on the other hand, would be the ideal candidate for an NTR MC. Plus, the fact that the MC is not the person who formed the relationships with the girls means that the impact of NTR is lessened as well. He is an imposter who doesn't actually have the real bonds with these women.
The art is a bit unpolished, but it still looks great. I'm not too sure about the femboys in the game though. What's the narrative purpose for it? Varrick is wearing some short shorts/hot pants, and he is supposed to be one of the NTR antagonists. Not sure what role the elf buddy will play, so I won't comment on his design.
I'd like to give a few bits of advice. NTR fans are not always fans of NTS. This mainly deals with how the MC reacts to the NTR, and how the game dispenses the scenes for the players to view. NTS scenarios are quite simple. The MC witnesses the events and gets horny or he engineers the events to happen. The player naturally sees the events that the MC sees. NTR, on the other hand, has 2 variations. First, we have the MC witnessing an event and being powerless to stop it (and not enjoying it). Secondly, it can be the behind the scenes NTR where he is not aware of it.
To be frank, most western developers are too obsessed with using the first kind of NTR distribution and neglect the "behind the scenes" scenes. Probably because they try to stick to MC's POV religiously. Unless you are intentionally going for the "mystery NTR" gameplay where the MC sees glimpses of things happening without fully realizing the truth, don't be afraid to write scenes that happen away from MC's POV. You could indicate that a scene happened and let the player watch it later in the gallery or "replay room." Or you could even just show the scenes immediately. It's not a big deal.
And the reason why this is a point of contention is because of the narrative constraints involved in writing an NTR story entirely from MC's POV. If the MC has to see the entire NTR arc play out in front of him, it gets increasingly hard to justify why he can't/won't do anything about it. That's why most Japanese NTR games feature an oblivious MC who still has a reason to pursue his dream/quest even though his girl is getting corrupted behind his back.
In this game, the fat guard taking the childhood friend into the building lead to two choices. Looking through the keyhole shows you what happens and she gains corruption points. If you just go to class without looking, she doesn't gain the corruption points even though the same event should have been taking place behind the scenes. Also, I wonder if you will differentiate between the two variations later, one where the MC knows the fatty is blackmailing her and one where he doesn't know. Viewing the scene at home from the reply room just shows you the variation where the MC is looking through the keyhole, even if you just went to class directly.
Anyways, seems like the game is still super early in development. Nothing really needs to be changed for the few scenes currently in the game, but maybe you could keep in mind that the MC doesn't have to be witnessing all the NTR stuff happening, especially as it gets more and more intense. It can be much hotter if the girls lie to him and he isn't aware of the extent of their corruption until it's too late.
Anyways, it's your story. You can disregard everything I wrote here if it literally goes against your vision or story outline. Good luck.