Tokyo of the future "Showa 101". Behind the seemingly bustling city, there is an inner world composed of "phantom" energy. In a subway accident, high school student Ren Uesugi accidentally awakens the ability to see and absorb "phantoms" formed by human obsessions. He was absorbed by the official organization "Yin Yang Liao" and became a "sequencer" who dealt with supernatural events. While investigating a series of urban legends, Ren discovered that all events pointed to a millennium conspiracy - the ghost of the ancient noble "Taira Shomon" was trying to be resurrected by gathering the "Sequence of the Seven Deadly Sins" to drag Tokyo into an eternal night where a hundred ghosts walk at night.
