Maybe you're just desensitized or forgot how bad it can get at times, but it features a lot of extremely graphic sexual content that would, quite frankly, make most people uncomfortable at best, actually ill at worst. I can't really think of a trigger warning that doesn't apply to this series.

I did enjoy the series despite those things, but it's doing people a disservice to not give a heads up about how extreme it is when recommending it.

Sorry for the bluntness of my reply, I appreciate you starting a recommendation thread! Just wanted to warn people that it's quite a few steps beyond most smut for the scenes that do include adult content.