Blood thristy revenge stories!! (Female protagonist)

I want to know too

The FL is ruthless here https://www.mangago.zone/read-manga/may_i_ask_for_one_final_thing/

I second that recommendation.

It's not heavy (it's nearly non-existent tbh compared to others) on the romance but I believe it might happen later on. Maybe.
Still, its a hidden gem and the MC goes through amazing character development through the story (in my opinion). The art isn't the best on the planet and it did take some getting used to but it's not bad. Try it.
https://www.mangago.zone/read-manga/ebony/

TW - Gore, Murder, Tragedy, & Bullying
https://www.mangago.zone/read-manga/misu_misou/
https://www.mangago.zone/read-manga/pumpkin_night/