Once upon a time, Shinobu Oomiya traveled from Japan to England for a homestay experience. While there, she formed a close bond with Alice Cartelet, the daughter of her host family. Although they spoke different languages, they were able to convey their sadness when it was time for Shinobu to return home. Five years later, as a first-year high school student, Shinobu received a letter via airmail written in a language she did not understand. The sender of the letter was none other than Alice, who detailed her own homestay experience in Japan. To her surprise, Alice would be attending Shinobus high school and living with her! Alongside their friends Youko Inokuma, Aya Komichi, and Karen Kujou, the five girls attended school together and learned about each other's cultures every day.
Characters and songs from this series also appear in the rhythm game Miracle Girls Festival, which was released on the PlayStation Vita in December 2015.The conversation school Coco Juku directed the series English segments.