To be honest, I do not class the Gym scene NTR either.... but alas.. ... there ARE a lot of fragile lonely guys playing these kinds of games. Whilst NTR and Cuckold are not even the same thing, yet alone when there is no established relationship..... within the fandom of the genre... and in a SMALL part this is due to some games which initially got popular having blindsiding NTR without warning...... but most just through fragility and insecurity of much of the player base.... within the AVN sector... sadly, NTR has come to mean ANY sexual interactions between a Love Interest... or anyone sexually accessible to the PC, and anyone else.
It is not strictly NTR in the strictest sense, that adheres to the original Japanese traditional definition. BUT, within the AVN sphere.... for much of the player base, ANYTHING whereby a sexually accessible roster character.....be they primary Love Interest, Side Piece, or even just one off pump and dump....has ANY sexual engagement with ANY other party than the MC... but especially with other men... is generally considered NTR.
Personally, I avoid that if I CAN, but it DOES NOT destroy a game if it happens.... I just understand the self insert egotism of it... I too prefer it when the MC, ME as the PC.... gets all the pussy, and the only NTR/Cucking is ME fucking other men's women, eventually making them mine...... but there is a whole lot of AVN players out there who can ONLY accept this.....the only LGBTQI content can be when THEY as the PC allow additional females to share in sexual encounters with any given one they are focusing on.... and the ONLY infidelity can be when hot bitches suck and fuck their MC... and nothing else at all.
And if you include such content, without warning, and opt outs to avoid it.... man, they will definitely let you know about it. It IS a lot of work though, to make two lots of scenes for everything. The BEST games in the genre handle the Trans thing, by making the trans character ... receive...for the most part.. not ... ahem... give... and then make TWO MODELS, one where that character IS trans... and one where they are female... and the player can select at the start. They usually handle the NTR thing... by not necessarily having an equal amount of scenes.... so three NTR scenes... you get three hetero non NTR scenes if you do not chose that path.... but instead they'll often include say three or four to one ratio... if there is say three NTR scenes in a chapter... and players avoid... they get ONE non-NTR sex scene on that path... BUT, they, the devs, will make it a good one, at the longer end of such scenes, multiple angles and perspectives, maybe some really hot kink involved, well lit, well phased, especially hot depraved writing. Apparently that still takes less effort than making three non NTR scenes to match content for the NTR ones... but also usually keeps players happy.
I'll think about subscribing, but to honest, because I have, in the very early days, scene peoples work from other sites, coopted.... shall we say... and integrated in to works on patreon, without recompense... whilst the person so doing makes money of that work... I have an ethical dislike of the platform, and tbh, usually feel like I will never use it.
HOWEVER, I'd be happy to pay again, for the completed game, when it is finally done, if it is listed here.