In 1940, young Kayoko embarks on her first-grade journey, known for her teary tendencies. Amid playful schoolyard chants and sibling antics, she eagerly anticipates becoming a big sister. Oblivious to the weight of this new role, she innocently donates her cherished doll to aid the war effort, reflecting her patriotic spirit. As time progresses, the shadows of war loom larger, profoundly impacting Kayoko and her community. However, the harsh realities of 1945 bring unforeseen challenges, painting a somber picture of the era. Inspired by Kayoko Ebina's personal encounters in wartime Japan during the Showa period.