Glasslip

Tōko Fukami's family runs a glass-working business in a small seaside town. She hangs out with her four best friends at a cafe called "Kazemichi." During the summer break of their senior year in high school, they meet a transfer student named Kakeru Okikura, who claims that a voice from the future talks to him, and that it's led him to Tōko. His arrival sets off a series of events that will make their final summer together one full of hope and heartache.

Synopsis from Anime News Network