Memoru is one of 245 people who came to earth from the Riruru Star when their ship had an emergency crash-landing on earth. Memoru's people have such tiny bodies that they could stand on a human's palm. One day she hears lovely music, and she follows its source and comes upon a huge house she hasn't seen before to find a girl taller than her playing on the piano. Memoru visited her again secretly with her friends Popitu, Rupangu, and Pi, but the human girl, Marielle, seemed sick and likely to die any moment. Feeling sad for the girl, Memoru's tear drops on the girl's lips. The girl gets better and a strong friendship starts between them. (Source: ANN)

A long time ago, Haruka Hoshinogawa made a wish with the town's old cherry blossom tree with her grandfather while receiving a present from him: a cherry blossom ribbon. As she grew up, she treasured the gift that was given to her while starting fifth grade in her school. One day, upon noting that the old cherry blossom tree is wilting, her grandfather decided to leave the shop to explore the world and let Haruka take care of the store in his absence. The next day while sleeping, her treasured ribbon sprouted a strange egg, revealing a Cocotama, a god born from an object that has been cherished with love and care. Haruka woke up and accidentally saw the Cocotama on the table, retreated to her Hiding Egg. As Haruka picked it up, it has changed into a mysterious key. Left with some questions, the Cocotama introduced herself as Ribbon, and Haruka learned about the existence of her kind and the mysteries behind the strange key she had. Ribbon realized that the key is actually the Key of Wonders and that Haruka was chosen by it to be the Legendary Contractor to the Cocotamas. Now, both of them try to run the shop and meet new Cocotama friends, while discovering the mysteries and powers behind the Key of Wonders.

Tiara, a princess from the kingdom of Waleland, travels to the city of Mamkestell to attend a prestigious academy for those who practice magic like herself. After passing a test to prove her eligibility, Tiara reunites with her childhood friend Rosetta, who is also a student there. She then joins and meets Rosetta's group: the athletic Lavie, the reliable Ashley, and the bookish Lynette—all of whom Tiara quickly befriends. In this institution, students are placed into one of three ranks based on their test score: group Noir being the highest, followed by Rouge and Lapis. Tiara's group is ranked Lapis, and if that wasn't enough, those who fail while ranked Lapis face expulsion. Realizing their dire situation, Tiana urges everyone to start taking their activities more seriously. On top of this, Tiara has one more purpose for excelling at the academy: to become more like her elder sister, who is a very skilled singer. However, to reach the stage that she desires, she will have to overcome many challenges, along with her companions, as she continues her magical journey.