Generation Witch Vol 5

From the Seven Seas Entertainment edition

TOUMA UNDER SIEGE Someone is selling magical drugs on the streets of Touma! Even worse—the yakuza are involved. Mari assembles a team of witches to crack down on the criminals, but the yakuza have a powerful, sword-wielding witch on their side. Meanwhile, the story takes a plunge back in time, to Touma during the war. The tale of the Great High Witch unfolds at last in the final volume of Generation Witch!

Source: Penguin Random House API