S flowers
Idk about this one cause I actually haven't read it
S flower and sadistic beauty are both really good, even if the femdom isn't really 'caring'. The femdom in Sadistic beauty is probably a tad bit better than S flower's, but sadly sadistic beauty got dropped. Besides those two the only other dominatrix webtoon I've ever seen is No Holes Barred... but the femdom is by far the absolute worst protagonist out of all of them. The first time she and her sub get it going it's pretty much rape :/ sorry it's not much, but it's all I've got.
http://www.mangago.zone/read-manga/sadistic_beauty/
http://www.mangago.zone/read-manga/s_flowers/
http://www.mangago.zone/read-manga/no_holes_barred/
Yup I was gonna recommend sadistic beauty too but idk I just thought that op wouldn't really like it
I'll give it a try
Also I've read some of sadistic beauty. Not my thing, she is too abusive and does not care about the guy's feelings at all.
Some femdom manga or webtoon with good storyline, where the woman isn't overly sadistic and abusive, but dominant and caring. (▰˘◡˘▰)