oops sorry here
https://www.mangago.me/read-manga/pieta_daong/
https://www.mangago.me/read-manga/o_g_oh_my_god/
https://www.mangago.me/read-manga/killing_stalking/
https://www.mangago.me/read-manga/16647/ (this one is kinda iffy)
https://www.mangago.me/read-manga/codename_anastasia/
Also this but chapters aren’t available on here
https://www.mangago.me/read-manga/blind_play/

Anyone recc a BL where they are both serial killers? Or just one of them?