The final follow-up volume of the Eisner-nominated, bittersweet sci-fi romance manga series that became a New York Times bestseller and inspired an anime! When Naho received a letter from her future self, it told her she needed to save the life of a boy in her class, Kakeru. At first Naho had to shoulder this burden alone, until her friends stepped in with their own revelations! Beyond the journey of Naho and Kakeru, what happens next for Naho's friends, now that they're living in this brand-new timeline? The final volume!