流鼻涕's feed

I never read it but I know the plot pretty decently and I just recently remembered it

Plot:
A man has the ability to see when people die. One day he meets this businessman/gangster?? and he can’t see when this man dies or it says he’s dead or something. I remember the dead? guy having white hair. I also remember it having a sad ending, please help me find it I want to read it