Amu Hinamori, a fifth‑grade transfer student, presents herself as fashionably cool, tough, and independent. Yet she comes across as unapproachable at home and school. In truth, her “Cool and Spicy” persona is simply a subconscious façade. Together with her guardian characters, she battles the Easter Company, which extracts people’s eggs to create X Eggs and X Characters, all in pursuit of a special egg known as the Embryo.