HELP

Guys, help me please, I am looking for a Manhwa.

I started this one thinking it's the one I wanted to read but I was wrong.

The one I am looking is also an omegaverse, and the alpha is a jerk, he tells the omega he doesn't love him etc ...
The omega's family member he was living with died (I think his grandpa or his dad?), so be tries to call the alpha to help him with his mourning, but the alpha ignored his calls thinking the omega is too annoying. They slept together like 1 or 2 days ago, and the omega told something to the alpha that upsetted him (i don't remember what but I think it was about him being marked by the alpha and the alpha refused or smth).
Now left alone in this world, the alpha grabs his belongings in his house, left his phone there and left.
The alpha went to his house after he heard about his family situation, and knocked on the door then called him. He heard the phone ringing inside so he thought that the omega was ignoring him (while he already left) and decided to leave because the omega "will always comeback to him"

I am sorry my memory is very fussy, I started it few weeks ago but I didn't have an account and I lost it ...
Thanks to everyone who is willing to help me :)