Ep. 1: Naho receives a letter from her future self warning about transfer student Kakeru Naruse

During the spring of her second year of high school, Naho receives a letter written by herself ten years in the future. The document accurately predicts upcoming events, specifically introducing Kakeru Naruse, a transfer student from Tokyo who takes the seat next to her in class. The letter explicitly urges Naho not to invite Kakeru to join her group of friends for an outing on that specific day. Despite the clear instruction to avoid this interaction, the underlying reason for this urgent plea remains a mystery, leaving Naho to question the significance of the warning and the potential consequences of ignoring the future message.

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