Okitama Miyabi is the director of Zenryoiki Ijou Kaiketsu Shitsu (known as Zenketsu). The company is the oldest investigation agency that tries to solve mysterious cases. Miyabi exudes an elegant aura and he possesses extraordinary knowledge, memory, and insight. With his abilities, he solves inexplicable abnormal cases that can’t be solved by even cutting-edge scientific investigations. His cases often involve the paranormal and the occult. He visits the scene and investigates in detail, putting all the facts together and deducing a hypothesis that everyone can understand. The words that he speaks are mysterious and he is a person who doesn't show people what he is in his mind.