Trying to remember title of an older manga

I'm trying to remember the title of an older manga. It takes place in a sort of medieval/renaissance fantasy setting. The world has humans turning into monsters, and the main character is this red-haired battle maid who's a sort of human/monster hybrid or something with superhuman strength who fights them. She has a blonde maid as a companion. I think the blonde's name was Flicker.

The story is episodic in nature with the maids being sent to different clients. One story had a little boy who secluded himself in his house because his mother was one of those humans turning into a monster. In the end he re-unites with his now-monster mother, who the protagonist cuts down before realizing who it is.

There's a lot of ecchi, and some censored sex too I think. I think the title started with the letter S. Anyone remember what it was called?

Trying to remember title of an older manga