Yuka Kamo, who has the ability to read human hearts, met Chihiro Moriya, a girl with 12 personalities, when she participated in the Hanshin-Awaji Earthquake volunteers. However, after the earthquake, she had a thirteenth evil personality called “ISOLA”. Yukari, who was introduced to her by volunteer member Aoki, decided to leave it to Hiroko Nomura, a full-time clinical psychologist at the Kogakuin High School because of the situation beyond her own hands. After that, the unrequited uncle who added Chihiro's daily abuse to a mysterious death. In the city, there were a series of incidents in which the people involved in her died suspiciously. (source: Japanese Wikipedia) Based on novel by Yusuke Kishi