Seikaisuru Kado, also known as KADO: The Right Answer, is a Japanese anime series that revolves around the sudden appearance of a mysterious cube and its enigmatic occupant, Yaha-kui zaShunina. As they negotiate with the Japanese government, the series explores themes of diplomacy, technology, and humanity's future. The narrative delves into the challenges of accepting radical changes while maintaining societal values. It combines elements of science fiction with philosophical questions, offering viewers a thought-provoking experience.