After the fierce battle with the great witch Digitallis came to an end, everyday life finally returned. Koyomi, having gone through life-threatening struggles, did not show remarkable growth as a magician; instead, she continued her clumsy and laid-back days. Suddenly, a mysterious magical creature, Firefox, appeared before Koyomi and her friends. Its true identity is unknown, and communication is impossible, yet for some reason, it has become attached to Koyomi and is always by her side. Moreover, when Koyomi is with Firefox, she can use magic too! Thus begins her longed-for magician life (with a cute familiar)! This highly popular series, serialized in 'Jump SQ.' and adapted into a television anime, is now back with a highly anticipated completely new installment!