Thank you namachi.
I couldn't believe that I got a response..I mean, help so fastly
I'm sorry but this isn't it...
The art style was quite different and that mc ie. exorcist has an elder brother too also he takes on various orders from the school students to find their lost items or other help.
That ML who got a ghost on his neck attached also asked for his help initially but later when MCs friend got injured in a car accident, he feared that it's coz of him that his friend got hurt as if he's a bad omen himself...
So he took back his words and started maintaining distance from the MC
Still thanks for the help
There's a bl manhwa I forgot it's title but all I remember is that it's a high school love scene where the mc with yellow hair can see ghosts and exorcise them while the ml with black hair seems to be suffering from a female ghosts attached to it also that the ml has some power I guess