The Eto Rangers utilize Kirinda, a Space-Time Transmitting Machine, to repair Mugen's Novel Worlds. These worlds are imaginative narratives, including old folktales and newer literary works, that play out cyclically and are essential for humanity's betterment. The Eto Rangers are anthropomorphic animals representing the Eto animals, each with specific Chinese zodiac signs. Princess Aura governs Mugen, an island continent suspended over the ocean from the Novel Pole, and is bestowed with power by the Great God Goal. However, she is confined within the small palace island area. Nyanma, also known as Chocolat, is the Spirit of Cats who was disqualified from becoming one of the twelve protectors and becomes the nemesis of the Eto Rangers. She seeks revenge by distorting Novel Worlds with Jarei Monsters. When Jarei Monsters infiltrate a Novel World, they manipulate the story, often creating a parody of the original. Bakumaru, the Spirit of Mice, must use the Genmakyou mirror to uncover the evil spirit's identity after clues are gathered. At times, the Eto Rangers must act out the story and assume the role of a character to uncover clues. After defeating the creature, Bakumaru raises his hand with one of Aura's 12 gems and calls upon Kirinda from a different dimension with "Daikourin Kirinda!" Kirinda then purifies the evil spirit with a beam weapon, announcing "Jouka!" (Purification).