To celebrate her 15th birthday, Miyuki Shiba goes shopping with her older brother Tatsuya in Yokohama; they get interrupted by a call from the main branch of their family, the Yotsubas, who are members of the Ten Master Clans.

Honoka Mitsui and Shizuku Kitayama are accepted into First High; Honoka feels a strong admiration for Miyuki, and she's overjoyed when they become friends; Honoka also respects Tatsuya but is surprised to find out that he is a Course 2 student.

Various clubs try to recruit Honoka and Shizuku; when they find themselves mobbed by club members, Eimi comes to the rescue, and the three of them become fast friends; Honoka and her friends witness Tatsuya being attacked by someone.

After observing the behaviour of Mibu and the Kendo Club, Tatsuya infers that the person who attacked him must be a member of the international anti-magic political organisation, Blanche.

During a debate, Blanche's combat unit invades First High; Honoka and Shizuku almost get attacked, but they fight back with magic; yhanks to Miyuki and her friends, the situation does not escalate out of control.

First High aims to win at the National Magic High School Goodwill Tournament of Magic Skills; Mayumi and the other seniors are fired up about claiming victory again; however, Airi Isshiki, Shiori Kanou and Toko Tsukushiin are determined to stop them.