Dating the King of Curses

Blurb provisional date: 2021.1.20 My name is Yuan Qianlong. In my sixteenth year alive, I fell in love with a demon god named Ryomen Sukuna. And now, a thousand years later, I am still alive, existing as an immortal, ageless curse. It all began on that blood-red night a thousand years ago, when my "lover" broke me into pieces and sank me to the bottom of the sea. A thousand years have passed, and I still love him. So I came to find him. [Important Notes] 1. This was a spur-of-the-moment idea I had while watching the anime. The pairing is as stated in the title. 2. The heroine is a little yandere. Who in their right mind would like that guy? (whispering) 3. This is a bloody path to love, for both the male lead and the heroine. Theme: There's no way to make him change, so I might as well be even crazier than he is.