"Isekai Teni, Jirai-tsuki" is a manga series that blends elements of fantasy, comedy, and action, centered around the concept of being transported to another world. The protagonist, a high school student named Kaito, is unexpectedly summoned to a magical realm alongside his classmates. However, unlike typical isekai narratives where the summoned individuals are revered as heroes, Kaito and his peers are treated with suspicion and hostility due to the circumstances of their summoning. The world they are thrust into is fraught with political intrigue, ancient conflicts, and a deep-seated mistrust of outsiders.

Kaito discovers that he possesses a unique ability tied to explosives, earning him the nickname "Jirai-tsuki" (landmine user). This power, while formidable, is unpredictable and dangerous, making him both a valuable asset and a potential liability. As Kaito navigates this hostile environment, he forms alliances with a diverse group of characters, including fellow classmates and native inhabitants of the world. Among them is a skilled warrior named Lina, who becomes a key ally, and a mysterious mage named Riel, whose motives remain ambiguous.

The plot unfolds as Kaito and his companions are drawn into a larger conflict involving warring factions, ancient prophecies, and the true nature of their summoning. The ruling powers of the world view the summoned students as tools to be exploited, while rebel groups see them as potential allies in their struggle for freedom. Kaito must balance his desire to protect his friends with the need to uncover the truth behind their predicament. The narrative explores themes of trust, survival, and the moral complexities of wielding power in a world where the lines between right and wrong are often blurred.

As the story progresses, Kaito's abilities evolve, and he gains a deeper understanding of the world's history and the forces at play. The series incorporates moments of humor and camaraderie amidst the tension, providing a balanced tone that keeps the narrative engaging. The characters' relationships and personal growth are central to the story, with Kaito's journey from an ordinary student to a pivotal figure in the world's fate serving as the driving force of the narrative. The manga combines action-packed sequences with strategic battles, as Kaito and his allies face increasingly formidable foes and uncover hidden truths that challenge their perceptions of the world and their roles within it.