At least has one of the following:
Slut FML or ML
Bisexual FML or ML
Netori
Trap MC
It doesn't matter if it's a fanfic or not.
Looking for R18 novels
Phanerobus_Gyms
Conqueror path
Prime originator
Vile evil hides
Dual cultivation
Vampire's slice of life
Reincarnated with the strongest system
Son of hero king
Profane prince of dominition
2 months later
try Ultimate NTR System! I wrote it!
3 months later
Here is a site that I discovered which gathers many R-18 novels