The winner of the 55th Japan Nebula Award! After "Your Name", the new pyramid of youth science fiction novels. A good harvest of awards and word-of-mouth! The memory of airships floating in the summer sky becomes a refreshing theme throughout the story. Xia Ji vaguely remembered that when she was a child, she and a boy named Toshio looked up at the airship. However, no matter how he thought about it, there was no such acquaintance around Xia Ji. In another time and space, Toshio also remembered meeting a girl named Xia Ji when he was a child. In the world where Xia Ji lives, the development of the moon and Mars is constantly advancing, but the Internet has just begun to be used. In Toshio's world, space exploration is still in the development stage, but the development and application of quantum computers has become a reality. The two people live in completely different "2021", but their respective destinies intersect across the world, as if connected by Zeppelin. As the surreal feeling gradually emerged in daily life, Xia Ji sent an email to "himself" using the newly opened email address. Unexpectedly, she actually received a reply from the other party... A "dimension-breaking" work for fans of science fiction and youth novels! Something not to be missed this summer. The daily life and subtle interweaving of the two parallel worlds echo each other, which makes reading both healing and mist-like sentimental.
