Koua Academy is a prestigious institution renowned for nurturing Japan's brightest minds. Amidst a rising suicide trend within the school, secrecy shrouds the alarming situation. In a bid to investigate, Fujimiya Aya embarks on a covert operation posing as a teacher. Unbeknownst to many, Koua Academy harbors ties to international terrorism. To unravel the mysteries veiled within the academy's walls, Persia enlists the expertise of Hidaka Ken and Kudou Youji in this mission of truth and discovery.