For hearing-impaired university student Yuki Itose, silence has been a natural part of life since birth. Her world is small and isolated; she commutes to campus, interacts with her best friend Rin Fujishiro, and communicates through writing and text messages—a lifestyle that offers little to no change. One day, during her commute, Yuki meets fellow student Itsuomi Nagi, a multilingual travel enthusiast and friend of Rin. When Itsuomi learns of Yuki's condition, he takes it in stride, moving Yuki's heart. From this one simple gesture, Yuki and Itsuomi's lives start changing day by day as they let each other into their own worlds.

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