The imagination of the screenwriter is still very breathtaking. The author has constructed two worlds, which are affected by two gravitational forces, and the people in the upper world are always affected by the gravitational force of the upper world. You can only live in your own space forever. Moreover, the upper class is rich and the lower class is poor, so free exchange between the upper class and the lower class is strictly prohibited. A boy from the lower class accidentally met a girl from the upper class, and the two began to fall in love deeply and secretly date. This love is so difficult, and it is not tolerated by the two worlds at the same time. The difficulties did not make the two people retreat, and finally opened the prelude to the fusion of the two worlds.
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