Licca Kayama is a young Japanese girl residing with her parents. Her father takes her on vacation to a mountainous town famed for its mystical Festival of the Stars. There, she stumbles upon a mysterious cat, igniting an unexpected adventure. As a city girl immersed in this rural setting, she experiences a slower pace of life deeply intertwined with local folk traditions and cosmic elements.

Her journey leads her into navigating a hidden mystical battle connected to the festival. Facing the unfamiliar, she demonstrates profound curiosity and openness. Her experiences escalate to confronting surreal cosmic phenomena, including encounters embodying the collective memories of all humanity and profound existential concepts. Throughout these intense challenges, she exhibits remarkable resilience and inner strength while maintaining her composure.

In other official media, such as an earlier story, she undertakes babysitting her relatives, Aki and Tomo. This situation requires her to manage a distrustful child and an uncertain younger one largely independently, showcasing her patience and sense of responsibility.

Licca possesses musical talent, specifically skill in playing the piano. Her family includes her mother, noted for her cooking and typically wearing a ponytail, and her father, who wears glasses. Licca transitions from everyday routines into extraordinary situations, confronting both mundane childhood duties and expansive metaphysical encounters.