In 1875, Uno was left without parents, and thus she decided to reside with the Kanou family. She became a companion of their daughter Mariko, who was of the same age as Uno. Uno and Mariko's friendship soon bloomed, and they both started attending Cimons private school. This story unfolds in the Meiji era where Japan was undergoing westernization, showcasing the beautiful bond shared between these two young girls as they explore their dreams and passions.