searching for a manhwa

i remember reading it not too long ago but can't seem to remember the title. it was a psychological manhwa i believe? there were two brothers, one with black hair and the other with plum-ish maroon-ish hair. all i really remember about the story was that the brother with black hair was insane in a way and at the end of the story ended up in a mental hospital(?), not too sure about that last part tho. also the cover picture was a pic of both brothers whilst it was snowing if that helps