In the Savanna area of a place known as Japari Park, a girl carrying a hat and a bag comes across Serval, who is a humanized animal known as a Friend. Noticing the girl has no memory of where she came from or what kind of animal she is, Serval names the girl "Kaban" after her bag and decides to lead her to the Savanna exit so she can find the Japari Library for more information. After receiving some help from a hippopotamus, Serval comes across a dangerous creature known as a Cerulean, struggling to find its weak point...