An intense action thriller from the artist of the bestselling series, High School of the Dead! A pair of fierce combatants calling themselves the Highjetters face off against Yuko Sagiri and Ample Zero near Tobioka Harbor. Who are these powerful girls whose strength rivals even that of the elite Black Label team? And why do they call Hitsugi "senpai"? Black Label's own dark past gradually comes to light as the battle for the city rages on!