Heartless reviews Glassip.
Premise: Glasslip follows the story of Toko Fukami, an aspiring glass-blower whose family runs a glass-working business. During the summer, she and her four friends meet a transfer student, Kakeru Okikura, who claims that a voice from the future lead him to Toko. His arrival sets off a chain of events for the six of them that will make their final summer together full of hope and heartache.