Long ago, Haruka Hoshinogawa made a wish beside the town"s ancient cherry blossom tree together with her grandfather, and he gifted her a ribbon of blossoms. As she grew older, she cherished that present even when she began fifth grade at school. One day, noticing the once‑lively cherry tree beginning to wither, her grandfather decided to leave the shop for a world journey and entrusted Haruka with its care in his absence. The following night, while she slept, her treasured ribbon produced an odd egg that unveiled a Cocotama—a spirit born from an object held with love. Haruka awoke to find the Cocotama perched on her table, then hurried to hide the egg. When she lifted it again, it transformed into a mysterious key. Puzzled, the Cocotama introduced herself as Ribbon; Haruka learned of her kind and the secrets surrounding that strange key. Ribbon explained that the key was in fact the Key of Wonders, and that Haruka had been chosen as its Legendary Contractor. Together they now manage the shop, welcome new Cocotama companions, and uncover the hidden powers of the Key of Wonders. Each day, the shop becomes a crossroads for wandering spirits; Haruka and Ribbon greet each newcomer with warmth, learning their histories. They also encounter challenges that test the key"s powers, revealing that it can open hidden realms and grant wishes when used wisely. Through these adventures, Haruka grows into a confident guardian of the shop and its mystical clientele.
