I wil have to say any porngraphic genre will feel this way after you see it once. Incest, Harem, NTR doesn't matter. It will feel pretentious while trying show as interesting, but in the end it's tropey based on some other successful entry of their respective genre.
I always felt this way about NLT Media games sexual content, even though I love playing their games because it reminds me mystery/detective game like old Agatha Christie games from back in the day, but when it comes to sexual content it uses over the top sexual positions that's used on Porn frequently, girls act like they are in the porn movies. You can clearly tell it's based on Porn, not actual sexual intercourse.