Set in a slightly futuristic Japan, the story takes place at Asticassia Technical High School in Kanagawa Prefecture. Suletta, a transfer student, unexpectedly meets Miorine, the daughter of a prestigious local family. When Miorine admits she hasn't found her dream for the future, Suletta makes a heartfelt suggestion: "Want to fill out a list of things you want to do—together?" Thus begins a youthful journey of dreams and discovery, as the two girls and their friends set out to explore a brand new frontier!