Okay, lemme try again, this time more respectful: Why are you so much against adding the NTR tag? It's called "NTR girlfriend", the theme is obviously cheating, people who are into this will search for the NTR tag anyway, and people who aren't into it, like me, won't miss out on anything by finding this game while they have NTR excluded (funnily enough that's exactly how I found it, I saw it even though I put netorare in excluded tags and came here to say someone must've missed it)
There's tons of games here which have specific tags just because it kinda somewhat is relevant, like half of games tagged with "exhibitionism".
Yes, the tag system isn't perfect and there aren't tags made for literally everything, but adding a netorare tag here will literally only help people who are actively looking for such games, there is absolutely no downside here.
I'd understand if the game had like... 10 hours of content and only mention of NTR was the dev maybe perhaps probably considering adding it in some indefinite future update, but so far everything says that girl(s) cheating on their partner(s) will be the main, and only, focus of the game