Phantom Busters, Volume 1

Straight A student Eugene Korekishi doesn't believe in ghosts...but his classmate Mogari Shishikuno is an exorcist who swallows them whole! Mogari can't see ghosts on his own, but once he and Eugene meet someone with the sight, there's only one path left—form an exorcist club at school and embark on a high school life that's anything but normal!