What's NTR
Good question.
Netorare. Full on Harem
NTR or netorare is a fetish of sorts that involves the stealing of love interests by a third party.
so like when your GF gets stolen by another guy.
often times in hentai and porn it'd be something like your GF getting fucked by another dude while you watch.
Cuckold
so this guy will end up NTR ....
（￣へ￣）