I understand your concern, and I appreciate your feedback. To clarify, a "tag" only exists if it is executed, and that applies to both LIs (direct relationships with the MC) and non-LIs. LIs have no involvement with any other character, while non-LIs may have scenes with the MC depending on individual choices. I apologize if I'm not providing clearer explanations, but I appreciate your comment, and it will be valuable for future updates.
Ps
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If a non-LI character gets involved with another character, it doesn't qualify as a "tag" NTR since it doesn't directly involve the MC. However, scenes can still be avoided based on the player's choices).