I Was Made an Assistant to an Old Woman Exorcist (Ghost) and Started Being Called a Chuunibyou Patient

Suzuki Taro, a second-year middle school student who has been able to see spirits since childhood, was possessed by the spirit of an old woman claiming to be an exorcist one day. He finds himself having to exorcise the evil spirits plaguing his middle school and seal away the mastermind behind them, but the method required proves to be painful for Taro.