Netorare (床取られ), often abbreviated as NTR, means "being robbed of love"—a situation in which a partner or lover is taken away by a third party, with the original character, such as the protagonist (or heroine), passively witnessing or unable to prevent it. This setting is common in danmei, manga, and adult genres, emphasizing emotional and psychological betrayal.
The opposite of NTR is Netori (床取り), which refers to someone who actively takes away another's partner; while Netorase (床取らせ) refers to a polyamorous relationship that occurs with the knowledge and acceptance (or even encouragement) of both partners.