Note* Japanese audio only, No English audio  Story:  Late 1970s, Yokohama. 17-year-old Umi (Nagasawa Masami) lives in a house on a hilltop next to the sea with her grandmother and other boarders. Everyday, she raises a signal flag for passing ships. Noticing the flag every morning is her schoolmate Shun (Okada Junichi), who sees it from his father's tugboat. The two eventually meet in school at a protest rally to protect the old Latin Quarter building, which houses all the interest clubs. Umi ends up joining the cause, getting other female students to help Shun and the other students clean up the building. In the process, Umi and Shun develop feelings for each other. However, Umi discovers a shocking secret from the past that threatens to drive them apart.