Perhaps the most depressing but vital movie produced by animation giant Studio Ghibli, Grave of the Fireflies is a searing and sweeping drama that covers the horrors of World War II through the eyes of teenager Seita and his young sister Setsuko. Between the violence of war and the tragedy of loss, the siblings struggle to preserve not just their lives but their humanity. In typical Ghibli fashion, there are moments of gentle beauty to be found, but instead of conflicting with the overall stark tone of the film, they successfully underscore war's futility and brutality, making Grave of the Fireflies one of the most important anti-war narratives ever told.