Synopsis
A beach holiday becomes more than anticipated for two individuals grieving the loss of those they loved. A mysterious girl known as the "Umi Warabe" might offer them a path to healing and moving forward. Matsunaga Yoshihiro serves as a chaperone for a group of high school students on a summer beach trip. One night, he rescues a student, Morisawa Nao, who is attempting to drown herself. She had taken the same trip a year earlier with her fiancee, who later died in a plane crash. As the two grow closer, it emerges that Yoshihiro harbors his own painful secret from the past. Watching over everything is a mysterious young girl who appears at decisive moments.