On an ordinary day, Suzuko encounters Shu, a child of one of her neighbors, in a park while returning from school and decides to accompany him home. Tragically, they never reach their destination. Suzuko and the young boy are caught in a massive gas explosion; however, instead of dying instantly, Suzuko awakens in the midst of a corpse-strewn battlefield during the Sengoku period. A group of marauding bandits attacks Suzuko, but Shukumaru—a boy who had come to loot the corpses to feed his starving village—saves her. Although they both return to the village, Suzuko refuses to give up her search for Shu and returns to the battlefield every day, with Shukumaru trailing behind. Despite Shukumaru lacking anything resembling modern manners, she gradually finds herself drawn to him. What fate awaits this young girl in this bloody period of Japan's history?