Women's prison that houses all the thieves. In the special building where Kyoka served as chief officer, Saki, who had killed Michio, her fiancee and a protective inspector, was housed. The two were classmates of the school days and had a special relationship with each other. However, Saki was jealous of Doubu and assumed that he had been killed, and continued the humiliating act of giving Saki as a feed for the perverted imprisonment officer.
