I think "Crimson Rain Pouring City" is pretty good, it's about the Demon Cult, and the male lead is the Demon Cult's godfather, and it's a bit abusive.......

"Night Walking Song" is a classic, a

"Night Walking Song" is a classic, and it's also the Demon Cult's

"Seven Nights of Snow" is considered to be about the Demon Cult, as the main line later on revolves around the Demon Cult.

"The Heartless Divine Physician", although the male lead isn't a demonic doctor. Although the male lead is not of the devil religion, the female lead is the devil woman poison king ......

I guess most of you have read it, I just haven't answered the question to make a fuss, hehehe