Through the activity of "Elfenbein" - an anti-government organization that Fon, Jacques and their other classmates established - Fon, now a 3rd grade student in Ilegenes Military Academy, became a threat for those important people in the government with connections to the black market. Meanwhile, two female military cadets entered the academy - something unusual in the all-male environment of the academy. One of them, Gabrielle, is surrounded by mysterious movements of unrest... The long-awaited new series of Ilegenes finally begin!!

• Ilegenes - Giyoku no Symphony