Witchcraft Works manga volume 15 features story and art by Ryu Mizunagi.

Just as soon as the air is cleared with Alcina, Kagari and the Chairwoman rush to rescue Takamiya from the clutches of Kayou, Kagari’s birth-mother. Kayou has a shocking plan centering on Takamiya, whose memories have been tampered with. With the Kagari estate as the stage for the showdown, Kagari must discover the true source of her strength. Meanwhile, Kasumi undergoes brutal bridal training…?!