What genre do u want? Reverse harem + smut? Or just reverse harem? If it just reverse harem + little smut + plot, its "Chitra" omg, that manhwa is soo UNDERRATED. If you want more, you can check in my list ლ(´ڡ`ლ)
I have some lists if you want:
Reverse harem: https://www.mangago.zone/home/mangalist/2374714/ (only in terms of people being interested in FL so not necessarily actual harem)
Only those with ACTUAL poly, mostly poly ending: https://www.mangago.zone/home/mangalist/2375222/
(I also have the BL equivalent lists but I don't think that's what you're asking for lmao)
Smut with FL: https://www.mangago.zone/home/mangalist/2923207/
Please does anyone know of any similar stories