Tragedy

Not manhwa but a movie try this movies
https://m.imdb.com/title/tt9660502/?ref_=nv_sr_srsg_3_tt_6_nm_2_in_0_q_Close
https://m.imdb.com/title/tt0112757/?ref_=nv_sr_srsg_0_tt_7_nm_1_in_0_q_The%2520cure

Or if you really want to read try reading this https://www.mangago.zone/read-manga/dam_of_the_forest/
But I suggest watching close movie the first one

You could try watching movies like

Close 2022
https://m.imdb.com/title/tt9660502/?ref_=nv_sr_srsg_3_tt_6_nm_2_in_0_q_Close

The cure
https://m.imdb.com/title/tt0112757/?ref_=nv_sr_srsg_0_tt_7_nm_1_in_0_q_The%2520cure

Or if you really want to read try reading
https://www.mangago.zone/read-manga/dam_of_the_forest/

But I suggest trying the first movie

Death is the only ending for the villainess
How to get my husband on my side

Gorae Byul - The Gyeongseong Mermaid
Sweet home
Hwaja