Syn's Questions (1)

Looking for a Korean BL/Supernatural Manhwa

Hi! I’m trying to find a Korean BL manhwa that I read around 2025, but I completely forgot the title.

Here are the details I remember:

* It takes place in a modern-day setting.
* The black-haired male character is a ghost/supernatural being who has existed for a very long time.
* He usually wears black clothing.
* He has a green circular pendant/amulet. I remember that this pendant is important because his supernatural powers are connected to it.
* The brown-haired male character is human. He looks young, but I remember that he is actually an adult.
* The brown-haired character dies, possibly after falling from somewhere, and then somehow returns to life.
* After his resurrection, he starts behaving strangely and sometimes seems to enter a dangerous state where he has an intention to kill.
* I vaguely remember his eyes turning red when this happens.
* The black-haired ghost has to stay with him and use some kind of supernatural/magical ability to calm him down.
* They have some kind of contract/agreement after the brown-haired character dies.
* Because of the brown-haired character’s condition, they need to stay together/inside the house for a period of time.
* I remember being around chapter 50 when I was reading it.
* It was a full-color Korean webtoon/manhwa.
* I originally encountered it on a manga-reading website, but I no longer have it in my reading history.

I may be remembering some details incorrectly, especially the eye color and the exact circumstances of his death.

Does anyone recognize this manhwa? Any possible title would be greatly appreciated!