Zhou Bei, a former courier, accidentally entered the Demon Extermination Bureau due to an S-rank inspiration value. On his first outing, he ran into an S-rank fierce spirit who turned out to be his late college roommate, and then discovered that his vixen landlord, werewolf coach, and other acquaintances were all demons, with 37 contacts in his address book on record. Because his spiritual constitution naturally attracts otherworldly beings, he was appointed as the Otherworldly Liaison Officer, responsible for communicating with the demon community. When a super S-rank evil spirit threatened the entire city, Zhou Bei summoned his demon friends to fight side by side, only to realize in shock that the evil spirit was actually his high school classmate who had been missing for many years. An urban tale of human-demon cooperation and resolving grievances with warmth thus unfolds.