"Denshin Mamotte Shugogetten" is a fantasy-comedy anime series that blends elements of romance, action, and supernatural themes. The story centers around Shichiri Tasuke, a high school student who inadvertently becomes the guardian of a magical sword known as Shugogetten. This sword is inhabited by three guardian spirits: Shaorin, a cheerful and energetic girl; Raorin, a calm and mature young woman; and Shao, a mischievous and childlike spirit. These spirits are tasked with protecting the sword and its wielder from various threats.

The narrative unfolds as Tasuke navigates his newfound responsibilities while balancing his ordinary school life. The guardians, each with distinct personalities and abilities, frequently manifest in the human world to assist him. Their presence often leads to comedic and chaotic situations, as their interactions with Tasuke and his classmates create a mix of humor and lighthearted drama. The series explores themes of duty, friendship, and the challenges of growing up, as Tasuke learns to wield the sword and harness its powers.

Throughout the series, Tasuke and the guardians face adversaries who seek to claim the Shugogetten for their own purposes. These conflicts often escalate into battles that test Tasuke's resolve and the guardians' loyalty. The story also delves into the backstories of the guardians, revealing their origins and the reasons they are bound to the sword. As the series progresses, the bond between Tasuke and the guardians deepens, highlighting their growth as a team and their commitment to protecting both the sword and each other.

The anime maintains a lighthearted tone, with episodic adventures that balance action sequences with comedic moments. The dynamic between Tasuke and the guardians serves as the emotional core of the series, as their relationships evolve from initial misunderstandings to mutual trust and camaraderie. While the overarching plot involves the protection of the Shugogetten, the series also emphasizes the everyday challenges and humorous misadventures that arise from Tasuke's dual life as a student and a sword guardian.