Komari Sano's parents ran a small Tokyo factory that manufactured aircraft parts. With her parents' influence, Komari Sano dreamed of becoming a pilot. During World War II, her older brother died as a kamikaze pilot and her parents died during the bombing of Tokyo. Komari Sano became an orphan and lived with her aunt. Her aunt ran a ryotei (high end traditional restaurant). After the war, all aerial activities were initially banned in Japan. After long negotiations with the Supreme Commander of the Allied Powers, Sizuo Matsuki, who is the security chief of Civil Aviation Bureau, finally launched Japan's civil aviation. Komari Sano applies for the position of a cabin attendant.

It is 1am. Yuya Sumino and Mio Nakase are on their way home from a drive date. In the awkward atmosphere after a fight, something happens that makes them listen to "Yamauchi Takahiro no Tsumami Ni Nareba", hosted by Yamauchi Takahiro. At first, the two are not interested, but they are drawn into Yamauchi's old stories about his past lovers, and their relationship gradually changes over the course of the 30-minute broadcast. The two personalities and listeners are of different ages and live in different places, but never meet. The feelings of the two couples intersect, and they connect over the airwaves, transcending the barriers of radio.