Responses
https://www.mangago.me/read-manga/heartless/
I love this author's work, and I recommend Feeding Lamb from them.
It's a meh to me now but if you can stomach it I also recommend you Orc's Bride from the same author.

Recommend me some manga/hwa/hua with bad ending or f* up(?). You know maybe something like the MC die or maybe the villain actually win at the end of the story. I'm feeling a bit too happy rn and it's scary so recommend me that can make me feel "ok now I'm depressed yet again"... something like The Blood of Madam Giselle or Killing Stalking would be appreciated. Thanks in advance! :)