A poor little girl lies dead. Her name is Fukuin Ririka, a genius child actor who was exploited and used by the adults around her. As her life ends, an unmistakable god appears before her. This strange encounter awakens something dark within the girl: a burning desire for revenge against all adults. Her plan is as grand as it is terrifying to turn every adult on earth back into a child. Thus begins a world-changing psycho-suspense story about the most evil and worst brat of a protagonist.

The manga follows Ririka as she wields her newfound divine power to execute her scheme. As a child star, she understands the hypocrisy and cruelty of the grown-up world intimately, having been its victim. Now armed with the blessing or curse of a god, she sets out to dismantle adult society entirely by reversing age itself. The narrative explores themes of generational trauma, the loss of innocence, and who truly becomes the monster in a cycle of abuse.

Serialized in Monthly Gangan Joker, the story ran from December 2023 to its conclusion in July 2025, spanning four volumes. Across its run, the plot charts Ririkas escalating campaign against adulthood, the chaotic collapse of social order as adults regress into children, and the moral ambiguity of whether her crusade is liberation or pure evil. The tagline Ah Poor adults encapsulates the series darkly comedic yet suspenseful tone, placing readers firmly in the corner of a vengeful girl who refuses to be a victim any longer.