A boyfriend and girlfriend in a long-distance relationship, with completely different jobs and places of residence. What keeps them together is their Kokoro and strong love. But even the smallest things can cause Kokoro to drift apart. "I want to be together forever." The two can only meet once a month, but they ask each other over and over again, as if to confirm their feelings for each other. "I love you. Even in 10 years, 20 years, or even if we're reborn."