Yall

I have a good recommendation but it’s not similar at all

Doesn't have to be similar, just a good story with deep characters

Wolf in the house, this one has an interesting plot, really good characters and mature relationships. completed.
Perle, this one is really good but it has a tragic ending, the whole story is sad but the ending is really tragic so prepare yourself if you decided to read it. Completed.
Paljae, it’s supernatural with Korean historical setting, pretty art but the plot is a quite thick and it needs a lot of concentration but it’s really good. Ongoing.
These are my most favorite manhwas and the ones that left an emotional impact on me, you won’t regret reading them

Escape into oblivion is also so good

I strongly recommend asumiko Nakamura's work, like Copernicus Kokyuu, J no subete, Double Minds or her more popular and tamenwork Doukyuusei. In general, she likes to explore dark and twisted themes with a lot of emotional intensity and a I would say a little bit of terror. But other good mangakas that have good writing, charismatic and complex characters and interesting stories are: Kunieda Saika, Yoshinaga Fumi, Takahashi Hidebu, Miyamoto Kano, Est em and Asada Nemui

And specific tittles I recommend are:
Beauty and the West Chamber
A painter behind the curtain
Ennead
Rumspringa no Joukei (this mangaka has other good mangas too, like Dear Gene with a age gape couple)
Oh and I forget my queen(? Lee Kyung Ha, she has good stories too, from her I especially recommend Intense.
Irreversible
Dog Style

OMG I read rumspringa no joke it was so good and refreshing

i would also strongly recommend "momentum" by the same author as wolf in the house!

Yes, how could I forget to mention momentum, such a good story it made me cry, the author, Park Ji-Yeon, has beautiful manhwas.

There’s also wet sand, it’s really good and it has so much angst

10 Dance