In a world where monsters and humans coexist and live ordinary lives, the protagonist Akane carries a hidden burden: her father is a monster. After a certain incident forces her to confront this heritage, she resolves to conceal her identity as a kaijin’s child and become a hero. Akane’s decision sets her on a path of vigilante action, navigating a society that still bears the scars of past monster invasions and the lingering prejudice that follows.

Akane forms a partnership with Kakeru, a fellow aspirant who initially remains unaware of her true nature. As they work together as heroes, Akane’s secret becomes increasingly difficult to keep. The pressure mounts when she finally confesses to Kakeru, deepening their bond but also raising the stakes. Their situation grows more complicated with the arrival of Careros, a figure who openly antagonizes Akane; Victor, the number-one hero of the hero association; and a man from Akane’s past carrying a personal grudge. These forces converge, drawing Akane into a conflict that tests her resolve, her relationships, and her place in a world that fears what she is.

The story unfolds over two volumes, beginning with Akane’s decision to hide her monster lineage and pursue heroism, moving through her partnership and the revelation of her secret, and culminating in a climactic confrontation that brings together all the key players. The narrative balances action-heavy battles with themes of identity, prejudice, and the struggle to be accepted for who you truly are. Akane must ultimately decide what kind of hero she wants to be—and whether being the child of a monster is a curse or a strength.