As long as the MC is not an asshole, anyone will do, but I prefer that the target is a husband, since I'm into married woman/MILF NTR. I tend to worry more about the guy doint the stealing than the guy that got stolen (although I don't really like netori). If the netori guy is a total asshole I don't like it. That reminds me, do you guys already saw Imazon's last mangas? Even though it's grilfriend NTR (which I'm not really too into) and the guy doing the stealing is a yarichin (I hate yarichin/delinquent types doing the stealing in NTR), that 2 chapter manga was awesome! The author did almost everything perfect:
The girlfriend is not totally reluctant and actually enjoys the sex. Check
The art is supperhot and the scenes have a lot of variety. Check
There is sex/cock comparison between the boyfriend and the Netori guy. Check
Even tough there is blackmail, the Netori guy is cleaver enough to use it as "shoves" rather than forcing the girl into sex. Check
The girl is not a virgin. She has sex with the boyfriend and the boyfriend is not the only guy she has had sex with. Check
The Netori guy is not a total asshole but not a nice guy either. There is a nice balance so the reader can't really like him, but can't totally hate him; he is more like the "playful" type (this is the best kind of netori guy IMO). Check
The Netori guy is not just a senseless human dildo, but actually enjoys sex. Check
I think it deserves a spetial mention the way the netori guy actually "breaks" her. Usually is sex sex sex sex, till the girls breaks in one scene. This time however was sex sex sex; stop... mmm... seems like she needs one more little push, ok... sex, sex, sex, sex.... STOP for real this time.... let some time pass..... and she will eventually come back, practically begging to be fucked. I don't know why only a few artists do this kind of plot, it's so hot to see the girl surrender herself when she realize her boyfriend/husband can't satisfy her. That's how NTR type B should be done.
I'm looking forward to future works from this author.