i've gotta say. the game has a lot of potential.
i really hope this one pulls through and delivers.
and as a massive pervert ntr enjoyer i have some suggestions:
-if the game is gonna have avoidable ntr, make a good amount of vanilla scenes too.
-there's nothing worse than ntr games that you can finish and avoid ntr, but have 0 h-content when you do so... this happens to great ntr games like scars of summer, protect the girl and reach true ending, only to have no h-scenes at all in that run.
-good examples are the crown of leanne's games... they have a heavy focus on ntr, and the MC gets a few scenes with the heroines. but even those feel incomplete if you fully protect the entire cast by managing resources correctly.
-the BEST example i can think of is oyako rankan. the ntr content is massive, but the mc has also lots of scenes with the heroines.
-another good example if it had more ntr scenes to qualify as a "game with an ntr focus", is "dungeon with girl" where there's a good amount of mc scenes even when you don't trigger any ntr.
having multiple scenes between mc and fmc allows you to do the usual "inner comparison" trope. which is often overlooked and mainly used at the ending of the game if you happened to stay with girl... when it's an easy chance of a display in corruption during the progress of the game
BAD examples of games that would have been better if the mc actually gets organic scenes during gameplay. Looking at some of the recent/popular ones:
-Solgante-> you can be efficient and do multiple missions, but the story won't reach an end until you commit to a bad route, would have been better if by doing enough missions without reaching a bad end, you can actually get to a resolution where mc gets a happy* end (happy as in the wife didn't fall despite being used).
-MOST AVANTGARDE GAMES-> barely no mc scenes in "loretta" made the entire route where you save her dry AF in terms of content. in "fox girls" barely no scenes with the duo heroines despite being in relation for most of the game, and with the ntr flag being actually hard to trigger. and almost no scenes in "amelia" when you actually save her at the end.
-most ACEROLA GAMES-> where the mc is not allowed to have sex with the heroine unless she has sex with a rando first. and when you do, it's mostly 4 variations of one scene. (100-75-50-25 lewdness or whatever)
-Netoria tactics-> amazing game, decent amount of ntr content but has barely any content if you "play well" by being strategic and defeating enemies without transforming into a female (corruption) or letting your partner be groped. despite being a strategy game, you barely get any content in the "good" route.
-nebel geisterjagger->great ntr game, but also barely any content if you protect the girl and clear the game.
TLDR; if the hentai game is gonna have avoidable ntr. it must still be a hentai game when avoiding ntr. it makes the player feel rewarded for protecting the partner. otherwise, why even bother protecting her? just make it unavoidable and at that point it becomes a generic wando wando game where the mc is a loser.