In a world where the Keroro Demon, a seemingly benevolent alien entity, has taken control of Earth, a group of humans must confront their deepest fears to save the planet. As the lines between reality and illusion blur, the truth behind the Demon's intent...

When a young girl, Mei, discovers her neighbor is a Keroro Demon, she must navigate the complexities of their newfound friendship amidst a series of mysterious events that threaten to unravel her world....