"Black Lion" is a 1992 OVA series set in a futuristic, war-torn world where humanity faces extinction due to a prolonged conflict with the alien race known as the Zalbard Empire. The story centers on Takeru, a young warrior from the resistance group Black Lion, who seeks vengeance against the Zalbard for the destruction of his home and the death of his family. Takeru pilots a powerful mecha called the Black Lion, a weapon of immense destructive capability, which becomes humanity's last hope against the alien invaders. The narrative unfolds as Takeru and his comrades, including the skilled pilot Reimi and the enigmatic scientist Dr. Tachibana, engage in a series of battles against the Zalbard forces. The Zalbard Empire, led by the ruthless Emperor Zalbard, seeks to conquer Earth and exploit its resources, leaving devastation in their wake. As the conflict escalates, Takeru discovers that the Black Lion mecha is more than just a weapon; it holds a mysterious connection to the ancient civilization that once thrived on Earth, hinting at a deeper, hidden history. Throughout the series, Takeru grapples with his desire for revenge and his growing understanding of the broader implications of the war. The story explores themes of sacrifice, the cost of war, and the resilience of humanity in the face of overwhelming odds. The characters are forced to confront their own motivations and the moral complexities of their actions as they fight to protect what remains of their world. The plot is driven by intense mecha battles, political intrigue, and the gradual unraveling of the mysteries surrounding the Black Lion and the Zalbard Empire. The series combines action-packed sequences with moments of introspection, creating a balance between spectacle and character development. As the resistance gains momentum, Takeru and his allies uncover shocking truths about the origins of the conflict and the true nature of their enemy, leading to a climactic confrontation that will determine the fate of humanity.