You guys are asking for a NTR tag completely on speculation, did you even try the game the green grocer is the only girl in the game that starts with somewhat mutual respect for the MC the others hate him or are complete strangers, if you want to go around with an MC exclusive harem then I can understand why the game would leave a poor impression on you but that doesn't warrant a NTR tag.
I think you're assuming that in the conversation you jumped in, NTR stands for a focus on the shame and the sense of loss that the MC feels when discovering they're being cheated by their significant one or seeing someone they're romantically attracted to being taken away by someone else.
But for a
very vocal group on these forums, NTR means that the MC sees a girl having sex with some guy that's not him, no matter their relationship.
Sharing/swinging? NTR. Groupsex? NTR. A potential love interest had an active sex life before entering a relationship with the MC? NTR. The MC witnesses a sex act between a throwaway random girl and a male character? NTR (I've seen with my eyes a case where the MC didn't even see anything, it was the narration that showed it to the player... The dev had to remove that scene.) The MC accidentally walks on his own sister having sex with her boyfriend? NTR. A female protagonist sees her boyfriend fucking other girls like a rabbit? Well, no, that's not NTR, that's cheating... because reasons.
A lot of devs end up tagging their games NTR even when it's not true just for not having their threads derailed... Just like this one. I can only guess how pissed must be the people that actually want to see NTR games while wading through a zillion of false positives.
Plus...speaking about a game after actually playing it? Pfft, I wonder what other sick kink you'll bring up after this one... </sarcasm>