Responses
ff
It's Yuri, it that's okay? Here are a couple I've read.
- Vengeance
http://www.mangago.me/read-manga/vengeance/
- Serenade
http://www.mangago.me/read-manga/serenade_keum_kyesoo/
(official links)
https://www.lezhin.com/en/comic/vengeance_en
https://www.lezhin.com/en/comic/serenade_en
Psychopath/Assassin/murderer gets involved with female lead