I just don't like gangbangs, if it's with NTR. It just doesn't really make sense to me that you're wanting to take someone else's woman and she's falling in love with you, and then proceed to share her with other guys? I'd prefer if it was kept 1-on-1 between the bull and the main girl, you know. Feels more impactful when the love is being transferred over to a single guy, making them the replacement of the husband/BF.
Although, since one of the main story points in the doujin is her literally being in a AV, ig it would make sense to have a gangbang scene. So I'm not trying to shut down the idea.
BUT, I still do like gangbangs, just outside of NTR. To each their own.