The pure and cute girl in the class after transferring turned out to be the childhood friend I played with.

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We will always be good friends. During that summer when we were still naive, Sajin (voiced by Togi Sajin) made a promise with his best friend. Seven years later, when Sajin transfers to a city high school, his childhood friend Haruki (voiced by Hasegawa Ikumi) has blossomed into a pure and beautiful young woman. Known as the "unattainable flower," Haruki smiles at Sajin in a familiar, affectionate way when they are alone. Between the countryside and the city, between a boy and a girl, between growing minds and bodies, although time apart may have changed some things, the unchanging thoughts and promises remain.