Little, Brown & Company World's Strongest Rearguard: Labyrinth Country's Novice Seeker, Vol. 7 (manga): Volume 7

In a grueling battle, Arihito’s group discovers a mysterious black box. According to Ariadne, a sentient weapon known as an Armament is sealed within! Autorid: Chana Conley, Huuka Kazabana, Noboru Akimoto, Rikizo Rikizo, Tôwa Tôwa