Eleven-year-old Saga Bergman resides in the fictional German town of Muhlenberg with her grandmother Regina, three years after her mother Ingrid’s tragic death. Ingrid, a celebrated pianist, perished in a bicycle accident while retrieving a toy piano meant for Saga—an event deeply shaping Saga’s resolve to honor her mother’s legacy by practicing daily on Ingrid’s relocated grand piano at a local music shop.

Saga’s life revolves around meticulous routines, balancing school, part-time work at a café, piano practice, and household duties. This rigidity, born from unprocessed grief and fear of unpredictability, often clashes with disruptions, yet contrasts her inherent compassion. She navigates caretaking roles—babysitting a young child and tempering the chaos brought by Sugar, a spirited Snow Fairy.

At four, Saga survived a fall from a moving piano after an intervention by Sugar’s mother, a Snow Fairy marking Saga’s first encounter with Season Fairies. Dismissing such memories until Sugar’s arrival, Saga’s rare ability to see these beings bridges her initially reluctant bond with Sugar, Salt, and Pepper, forging alliances that challenge her guarded world.

Her interactions with Sugar’s unpredictability gradually soften Saga’s rigidity, teaching her spontaneity and emotional openness. By fifteen, seen in an OVA, she embraces vulnerability, wearing her mother’s restored childhood dress in a school play—symbolizing her enduring tie to Ingrid. Key relationships include her supportive grandmother, Regina; Greta, a rival-turned-ally; and Phil, a classmate whose inventive spirit sparks subtle romantic tension.

Saga’s journey culminates in aiding Sugar’s ascension as a full Snow Fairy, costing her the ability to see Season Fairies. Yet faint traces of their presence linger, echoing her growth from grief-driven isolation to embracing life’s unpredictability—a testament to healing through letting go while cherishing memory’s quiet persistence.