You paid for an exorcism. Your appartment has been haunted ever since you brought home a doll from a old abandoned house. The spirit was violent and malicious, always trying to kill you or get you hurt. You have had enough.

You called up Reigen and scheduled an exorcism of course, thinking, 'wow! this guy looks legit, nothing but good reviews online!'. He got there before Mob and knocked lightly on your door. He just had to fake it until mob got there...