"After the war, Japan was divided into northern and southern parts. In Aomori Prefecture under the rule of the US military, teenagers Hiroshi Fujisawa and Takuya Shirakawa both like their classmate Sayuri Sawato. They all have Sayuri in their hearts, and that thing - the Tsugaru Strait north of the border, the towering "tower" in the clouds built by Japan's Hokkaido Federation..."