Ikai Shinrishi no Shoukido to Iken

Overview

In 2013, an evil god descended upon Enoshima Island. The area around Kamakura descended into madness and became a peculiar place known as the “Other World”. As everyone succumbs to madness, only one professional psychologist is capable of saving those trying to maintain their sanity: Jun Mamiya. She is aware that she is doing dangerous work, but she cannot deny that she continues to be fascinated by the strange. After an incident, Jun meets Engetsu Shimano, an unlicensed psychologist considered by many to be the best in the world. It was inevitable that Jun would be drawn to this man who lives in the Other World and continues to confront the bizarre... (Source: Hobby Japan, translated)

Source: AniList