I humbly suggest you remove it from your trinity and instead add "A Basic GuideBook to BDSM"
REAL
I loved the recommendation, I thought the plot/script was kind of bad BUT I UNDERSTOOD EXACTLY WHY YOU RECOMMENDED IT TO ME! Definitely when we talk about coherence and aspects of BDSM this manhwa is far superior to the others. I think I would take out Simplifield pervert romance because it is more focused on S/M than BDSM per se. Not that I think the others are masterpieces, but I'm getting a bit of an appreciation for them.
*I don't think the ones I mentioned are the epitome of BDSM, I understand the flaws of each one. I only have an affectionate appreciation for them. That's why it was a personal list. I must say that I know the ones very well BDSM rules and practices since I've been part of the community and it's the subject of my TCC. I'm just a reader who separates fiction from reality when it suits me*
It surprises me that I'm in shock. But damn, this is GOOOOD! Only the parts of putting it in without preparation and bleeding that cut my arousal BUT OTHERWISE EVERYTHING IS VERY GOOD. My BDSM trinity is now composed For this manhwa, A Man of Virtue and simplified perverted romance.