Shoko, a flight attendant, is nearing thirty while watching her colleagues get married one after another. Her last romance was back in high school with Kantaro, who left on a journey because he detested the life his parents had mapped out for him. Before he left, however, he had made a promise: if they were both still single in ten years, they would get married. Now, a decade later, Shoko and Kantaro reunite. Yet, standing in the way is Misaki—a childhood friend suffering from a terminal illness who dreams of becoming Kantaro’s wife...