Ichihashi Nanao is an exceptionally brilliant student and the first transfer student ever admitted to Mehabia Catholic School. Within this unique institution, ultimate authority rests not with the faculty but with the Judicature Club, a school-sanctioned tribunal responsible for resolving all student disputes. The club’s president and presiding judge is Hanegi Raika, a strikingly beautiful boy with a feminine appearance who becomes the first person Nanao meets upon her arrival. Although the highly exclusive club eagerly seeks to recruit her, Nanao is reluctant to pass judgment on others. However, when she herself becomes the subject of a trial, she may have no choice but to step into the courtroom and confront the school’s uncompromising system of justice.