In 1945, Katsuo volunteered as a Kamikaze. He and Toshio became good friends. Katsuo sees a picture of Toshio’s younger sister Sizuko and falls for her. One day, Katsuo receives an order to fly out, but Katsuo is unable to go because of a high fever. In his place, Toshio flies out on the mission. Toshio does not come back and the war soon ends. 70 years later, Katsuo has only six months left to live. To atone for the death of his friend Toshio, Katsuo visits a temple with Toshio's memorial tablet. There, he meets Sizuko’s daughter Kiwa. ~~ Based on the novel "Ku-jin" by Rei Kiyomiya.