After a heartbreaking incident leaves Haruka and Sora Kasugano parentless, they decide to start afresh by returning to the traditional, quaint town they lived in four years ago. Nevertheless, going back to their childhood home brings them face-to-face with past memories, both pleasant and unpleasant. Meeting old acquaintances and making new allies merely adds to the complexity of Haruka and Sora's already intricate lives. Unexpected feelings such as love, friendship, jealousy, and even desire start to mold their being.