As Long as I'm Sane Enough, Spiritual Beings Can't Hurt Me

He is an outstanding exorcist, burdened with the task of maintaining social order.He is an all-around student trained by the gym teacher.Why did he enter a mental hospital?What is the use of the broken blade in his hand?Why does that tattered mobile phone suddenly scold people for no reason?Behind all this, what else is hidden?The truth is in... the Mental Ward!"I just want to exorcise, what are you doing, I'm really not a crazy patient!""Okay, okay, get on the car, I'll do whatever you want to exorcise!"