Looking for Manhwa

Hey yall!

I remember reading this Korean BL Manhwa. It was like "historical" or like back in the old days in Korea (for lack of better words). And the guy had like off color since he was not fully human? And he could see like spirits or ghosts? And there was a side story of step brothers were they hated each other. And one of them dies, and it's revealed that the older stepbrother actually loved his younger stepbrother. I recently remembered this manhwa and I can't get it out of my head. If you can help me, I would appreciate it!

Thank you!