With World War II looming on the horizon, information about other nations' social and economic conditions has turned into a prized commodity. Consequently, Japan founded a fresh intelligence unit called the 'D Agency' to secure this advantage.
Led by Lieutenant Colonel Yuuki, eight operatives have been tasked with penetrating and monitoring several of the globe's most influential states, reporting any wartime developments. To execute these perilous missions, they have honed their physiques for harsh environments and mastered diverse disciplines such as signal tactics and foreign tongues. Yet, their greatest asset remains the skill to influence individuals, extracting critical data that grants their country a strategic edge. Their covert endeavors are meticulously planned to avoid any trace, safeguarding Japan's strategic interests worldwide and security.