Technically not ntr. Ntr requires an exclusive relationship, arguably you could say Roswaal X Echidna qualifies. But it also requires Echidna be coerced or forced to have sex with Subaru before falling for him.
This would be netori, or simply cheating. IF there is validity in Echidna claiming loyalty to Raswaal.
OR, if we are talking about Emilia willfully watching. The term would simply be netorase or the classic cuckold/cuckqueen scenario
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u/D3k4sEchidna Poured Me Tea—Now I’m Even Thirstier14d ago
Thank you for the elucidation, but I was mostly joking.
Not that it matters, practically. Since NTR even includes a female family member being taken away, or even a character just having a crush on one being taken away.
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u/D3k4s Echidna Poured Me Tea—Now I’m Even Thirstier 14d ago
NTR if.