After-School Bitchcraft, Vol. 2

While Renji continues to train Ririka, he's visited by none other than Berta Mathers, his former pupil and a member of the Sorcerers' Association! She's come to keep an eye on him, and when she finds him dabbling in forbidden magic…she's more than ready to teach him a thing or two. But they've got bigger problems, as one of Berta's colleagues catches Ririka alone and attacks her! Will Renji and Berta make it in time to save her?

Volume 2 of the After-School Bitchcraft manga series by Yu Shimizu.