At a new school, a transfer student named Miku encounters a boy named Yuu whose beauty reminds her of snow. Though they have never met before, Miku feels an inexplicable sense of recognition, as if she already knows him. This unsettling familiarity draws her into a quiet, tender, and increasingly painful relationship with Yuu. As the story unfolds, the mystery behind their connection deepens, and Miku eventually recovers a buried memory—one that is both heartbreaking and cruel, linking them to a shared past that neither of them fully understood. The narrative follows the emotional journey of these two characters as they navigate love, loss, and the weight of forgotten time within the ordinary setting of school life and the daily commute.