This is theatrical version of the popular television series. Yui, Ritsu,Mio, and Tsumugi, are girls in their third grade, who play in the school band. One day, while spending another peaceful day drinking tea and discussing the future of the band, they find out that their classmates are planning a graduation trip. They decide to go on a trip, too. So each one of them writes down where she wants to go, and in the end they agree on one destination, London.