It tells the story of Fujisawa Hiroki, Shirakawa Takuya, Sawatatsu Sayuri and the tower. The three of them agreed to build a small plane and fly to the tower to find out.
Foreword: Exxon Tsukinoie (the heroine Sayuri's grandfather) is the first physical scientist to confirm the existence of a "parallel universe". He created a "mysterious tower" to capture information from parallel universes and predict the future of the real universe. He inputs the captured information into the consciousness of Sayuri's sleep state, and at the same time, the tower will replace the current space with the space of the parallel universe according to Sayuri's sleep state. Therefore, Sayuri's sobriety is the key to the tower's space transformation.
In the film, Hiroshi and Takuno are good friends, and Sayuri is their classmate. From the first sight of Sayuri, Hiroshi has a crush on her. After chatting with Takuno on the same train, Sayuri was invited to their part-time job.
After the war, Japan was divided into two parts, North and South. The U.S. military ruled the western Aomori prefecture, and the teenagers Fujisawa Hiroki and Shirakawa Takuya both like their classmates in the same grade. They all have Sayuri in their hearts, and that thing—the Tsugaru Strait to the north of the border, the towering “tower” built by Japan’s Hokkaido Alliance.
They were found secretly making planes in the warehouse of an abandoned old station next to the factory. They wanted to fly a plane named "Velaciela" to see the mysterious giant tower in the north. The abandoned station in front of the warehouse is vast and still retains the original railroad tracks. After Sayuri learned of their plan, he was so excited that he made a promise of three people in this heavenly place to go to the end of the cloud to see the giant tower together.
Soon after, Sayuri suddenly changed schools and has since disappeared. Hiroshi and Takuno stopped the "Velaciela" plan and stopped building airplanes. In order to forget the dream that once existed, Hiroshi went to Tokyo to go to high school, and Takuno stayed in Aomori's high school to specialize in physics and studied as a researcher. room, the space transformation of the research tower.
Due to the reaction of the giant tower, Sayuri fell into a coma for three years, and has been alone in a parallel world in a dream. And Hiroshi, who was in Tokyo, also lived alone for three years, dreaming of the scene when he went to school with Sayuri all the time. Suddenly Hiroshi received a letter from her and learned that she was in a coma and was hospitalized. When she came to the hospital, she found that she had been transferred. At this time, Hiroshi had a feeling with Sayuri in the parallel world, and the picture returned to the abandoned station that was silent, free and promised. to save her.
Sayuri was transferred to Tuoye's research room. After Tuoye learned everything, he assisted Haoji to start a war in the north and south. He flew her to the side of the giant tower by flying a plane, woke her up, and at the same time launched missiles to destroy the giant tower. Space ceases to transform, not to be swallowed. (Researchers have found that Sayuri's sleep and dreams are related to the space displacement of the tower, and if she is fully awake, the entire universe will be displaced.)
The plan was successful, and their agreement was fulfilled. After Sayuri was awakened, due to the destruction of the giant tower, Sayuri lost all memories in the parallel world. She confessed her feelings to Haoji immediately before she lost her memory, and they were in each other's hearts. At the end of the story, even though there is no place in this world where they agreed to go, their lives will begin from now on.
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