Babel's Ranking Tournament, Begin!.The annual ranking tournament, held to measure the strength of the students, has arrived. Akatsuki, Miu, Kazuha and Chikage team up and easily subdues all opposition. That evening, Akatsuki accepts the student council's challenge to fight him. Their match is interrupted by Kaidō, who warns that the magic barrier that protects the students from actually being harmed has been sabotaged and if the fight now they will kill each other by mistake.