Chained Soldier, Vol. 6 (manga)

Tenka falls after a fierce duel with Aoba, but with the arrival of backup from the 6th and 7th squads, the battle is drawing to a close—that is, until a new force of humanoid Shuuki calling themselves the Eight Thunder Gods join the fray! Unaffiliated with Aoba’s group and boasting overwhelming power, what could these mysterious figures be after…?!