Jeongyeom has avoided his arranged marriage for years, but with mounting pressure from the other family, he can no longer delay. Yet, his heart has already been claimed by someone irreplaceable—his younger brother, Dong-im. Dong-im is not only Jeongyeom’s forbidden love but also the one Jeongyeom has kept by his side, no matter the cost. In the biting chill of winter, longing for a spring that may never come, Jeongyeom finds himself once again drawn to Dong-im’s room. i2l45
“Dear brother, how does it feel? How does it feel to marry my woman?”
Original Webtoon:
Lezhin, Bomtoon
Official Translations:
English, Spanish, Thai, T.Chinese
Japanese: Beltoon, Lezhin
Note: The official English, T.Chinese, Spanish and Thai translations are uncensored.
5 Chapters (Complete)

The art is incredible. I can ire the beauty of the story as well, but it really isn't my type of toxic.
It really feels to me as if they're hurting each other for the sake of it. You'll probably like it if you enjoy Greek tragedies though, it's a very "doomed from the start" kind of story.
Also a great example of why incest isn't really about blood relationships, but rather power imbalances and the dynamics of people raised together (in the case of siblings/cousins). Unfortunately a lot of people seem to think that not being blood related makes adopted brothers "not real" brothers, and this pair of brothers being very distant cousins originally, "only incest by the most technical of definitions". I mean this in the kindest way, please read about actual incest before saying that.