I don't know; a lot of harem or "vanilla" games tried that mechanic, and the target audience didn't like it at all. Like I said, most players don't care if it's optional; they just dislike the idea of a scene where the women are with men other than the protagonist. Instead of a loss resulting in NTR, it should just be a "Game Over" where the protagonist dies,idk. As I said, if the game isn't meant to be NTR, it's better not to include it; It will only drive away the vanilla/harem community. Once the NTR tag is added, many of those players will avoid the game—either because they see the tag and walk away, or because they have that tag on their ignore list. Meanwhile, NTR players won't be satisfied either due to the lack of content, since the NTR element would only appear during a "Game Over." And being forced to win a battle or else face NTR—that doesn't add depth to the experience; it just creates frustration for those looking for a vanilla or harem-style game.
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It doesn’t matter if some people nitpick a specific detail of the game; as long as the gameplay and the scenes are high-quality, that’s what counts. As I said, those who don’t want NTR can simply win their battles if they dislike that content, while those who enjoy the genre will know how to access it—there’s something for everyone. In any case, I’ll do things my way; if some decide to walk away because they don’t like the variety of content, that’s their business. End of discussion.