"High School Aurabuster" is set in a world where certain individuals possess unique abilities known as "Auras," which grant them supernatural powers. The story centers around Kaito Tachibana, a seemingly ordinary high school student who discovers he harbors a rare and powerful Aura after a mysterious incident at his school. This revelation thrusts him into a hidden world of Aura wielders, where factions vie for control over the source of these abilities, known as the Aura Core.

Kaito is recruited by the Aurabuster Academy, a specialized institution that trains individuals to harness and control their Auras. The academy serves as a front for a larger organization dedicated to protecting the Aura Core from falling into the wrong hands. Alongside Kaito are several key characters: Rina Fujisaki, a skilled and disciplined Aura user who becomes his mentor; Haruto Soma, a rival with a dark past and a vendetta against the academy; and Yui Aizawa, a cheerful yet enigmatic classmate whose Aura abilities are tied to her mysterious origins.

The plot unfolds as Kaito and his peers face escalating threats from rogue Aura users and shadowy organizations seeking to exploit the Aura Core for their own gain. The narrative explores themes of power, responsibility, and the moral complexities of wielding extraordinary abilities. As Kaito grows stronger, he uncovers secrets about the origins of Auras and his own connection to the Aura Core, which places him at the center of a brewing conflict.

The series balances action-packed battles with moments of character development, delving into the personal struggles and relationships of the main cast. Kaito’s journey is marked by his efforts to reconcile his newfound powers with his desire to protect those he cares about, while Rina, Haruto, and Yui each grapple with their own motivations and loyalties. The story builds toward a climactic confrontation that tests the limits of their abilities and forces them to confront the true nature of the Aura Core and its impact on their world.