Revenge stories. I don't mind a little bit of romance, but it shouldn't be the focus. Than...

https://www.mangago.zone/read-manga/ijimeru_aitsu_ga_waruinoka_ijimerareta_boku_ga_waruinoka/
https://www.mangago.zone/read-manga/revenge_is_ours/
https://www.mangago.zone/read-manga/cheating_men_must_die/

Hope you enjoy dear

Be sure to click on the blue + to see everything

https://www.mangago.zone/read-manga/maria_no_danzai/
https://www.mangago.zone/read-manga/the_one_within_the_villainess/
https://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/