"Heroes Are Extinct!" is a manga series that blends elements of science fiction, comedy, and action. The story is set in a world where Earth is under threat from an alien invasion led by the Zoruma, a race of technologically advanced beings. The Zoruma have a peculiar mission: they aim to conquer Earth by defeating its heroes, believing that humanity’s heroes are the key to their subjugation. However, they soon discover that Earth no longer has any traditional heroes, as the concept has faded into obscurity.

The protagonist, Chikara Momoi, is an ordinary high school student who inadvertently becomes the focal point of the Zoruma’s mission. Despite lacking any heroic qualities or powers, Chikara is thrust into the role of Earth’s last hope when the Zoruma mistakenly identify him as a hero. Alongside him is Aya Hoshina, a classmate who becomes his reluctant ally, and the Zoruma commander, Zoruma No. 7, who is determined to fulfill her mission but begins to question the morality of her actions.

As the story progresses, the Zoruma’s invasion takes on a comedic tone, with their attempts to provoke heroic responses from humanity often backfiring. The series explores themes of identity, heroism, and the absurdity of war, as Chikara and Aya navigate their newfound roles while the Zoruma grapple with their own purpose. The narrative balances action-packed encounters with humorous misunderstandings, creating a unique dynamic between the human characters and their alien adversaries.

The manga delves into the evolving relationships between the characters, particularly the growing bond between Chikara and Aya, as well as the internal conflict within Zoruma No. 7. The Zoruma’s rigid adherence to their mission is contrasted with their growing curiosity about human emotions and values, leading to moments of introspection and unexpected alliances. The series maintains a lighthearted tone while occasionally touching on deeper philosophical questions about what it means to be a hero and the consequences of blind obedience to authority.