"Aoi Kioku - Manmō Kaitaku to Shōnen-tachi" is a historical drama anime that explores the experiences of Japanese settlers in Manchuria during the early 20th century. The narrative centers on a group of young boys sent to Manchuria as part of the Japanese government's colonization efforts, known as the Manchurian Youth Colonization Program. The story unfolds against the backdrop of Japan's imperial ambitions and the harsh realities faced by these settlers in an unfamiliar and often hostile environment.

The protagonist, Shōta, is a determined and idealistic boy who volunteers for the program, driven by a sense of duty and the promise of a better future. Alongside him are several other boys, each with their own motivations and struggles, including Hiroshi, a pragmatic and resourceful companion, and Kenji, a sensitive and introspective character who grapples with the moral complexities of their mission. The group is led by a stern but caring instructor, who guides them through the challenges of farming, survival, and cultural clashes with the local population.

As the boys adapt to their new lives, they face numerous hardships, including harsh weather, food shortages, and the psychological toll of isolation. The series delves into their personal growth, friendships, and conflicts, as well as the broader implications of Japan's colonial policies. Tensions rise as the boys encounter resistance from local communities, forcing them to confront the ethical dilemmas of their presence in Manchuria. The narrative also touches on the impact of historical events, such as the outbreak of World War II, which further complicates their situation.

The anime portrays the boys' journey with a focus on their resilience and the bonds they form, while also addressing the darker aspects of colonization and its consequences. Through its exploration of historical events and personal stories, "Aoi Kioku - Manmō Kaitaku to Shōnen-tachi" offers a nuanced perspective on a lesser-known chapter of Japanese history.