Plot info: Looking for the name of manga/web-comic where the illegitimate daughter of duke is sacrificed to demon/vampire in the woods. From what I recall, the forest demon became like that because he sold his soul to a demon to save his sick girlfriend or something like that and in order to stay alive he has to steal the souls of young women so he makes a deal with the duke where he has to send him a sacrificial girl every so he doesn't terrorise the village. The duke's illegitimate daughter is pretty so all the village girls hate her and her older half-bro creeps on her. The duke's legitimate daughter is supposed to be the sacrifice but she is very ill and the duke doesn't want to give her up so he promises the illegitimate daughter's mother that he'll recognise her as his mistress if she sacrifices the daughter. However, before she is sent away the girl becomes sick because of medicine that the legitimate daughter gives her but she's saved by another demon or something so she was sent to the forest demon. There was only a few chapters out when I read it so that's all I know.

Other details: I'm pretty sure this wasn't your typical manga art style and was quite minimalistic and unique. I don't think it was in colour. It was a little gore-y when the girl got sick and it showed maggots in her wound. I think it was recommended to me as being similar to [m](Ayesha's Secret) and definitely had similar vibes. I think maybe it was originally in Korean.

It's so annoying that I can remember so much about it but not it's name or enough to find it by googling🙁
Thanks in advance!