Synopsis: Parabellum

On his inaugural day at Hinomiya Academy, Kuze Aoi is greeted with a frightful shock - a loaded firearm aimed directly at him. His comrade from childhood, Miyabi, escorts him into the school's community and acquaints him with its captivating Prince and Princess - Shitara Sagiri and Hinomiya Kuon - whose unmatched elegance and attractiveness commands respect. However, Aoi's delightful first day takes an unexpected turn when he loses his way and encounters Kuon's shooting range. Although almost harmed, he is rescued by a girl named Atarashi Sonoko, who appears to be a random stranger. In truth, Aoi harbours a secretive truth that is intertwined with the extensive and bitter rivalry between two powerful families.