The show is revolves around Haruka Hoshikawa, a fifth grader that when she was a child, made a wish to the town's old cherry blossom tree with her grandfather. Growing up, she had always treasured the Cherry Blossom Ribbon that was given to her as a gift from her grandfather while starting fifth grade. Upon noticing the tree was beginning to wilt, Haruka's grandfather decided to go and explore the world, leaving her behind to take care of the antique shop he works at.
One evening, after a long day of working at the shop, she falls asleep and out from her ribbon sprouts a mysterious, magical egg which births a Cocotama goddess named Ribbon. She wakes up, not knowing of who she is. She resonates and a key called The Key Of Curiosity appears from Ribbon's Hiding Egg. Left with questions, her and Haruka work together to uncover new mysteries and lessons about the history and functions of The Key Of Curiosity, as well as taking care of the antique shop and meeting new Cocotama friends along the way!