"Tekkaman Blade II" is a six-episode OVA series that serves as a sequel to the original "Tekkaman Blade" anime. Set several years after the events of the first series, the story revolves around a new protagonist, Shinya Aiba, a young man who becomes the successor to the Tekkaman Blade armor. The series explores themes of legacy, sacrifice, and the ongoing battle against the Radam, an alien species that continues to threaten humanity.

The narrative begins with Shinya, a former test pilot, being chosen to inherit the Tekkaman Blade system after the original Tekkaman Blade, D-Boy (Takaya Aiba), is presumed dead. Shinya struggles with the immense responsibility of wielding the powerful armor, which requires a symbiotic bond with Pegas, an advanced AI system. The series delves into Shinya's internal conflict as he grapples with his insecurities and the pressure of living up to D-Boy's legacy.

The Radam, having evolved and grown stronger, launch a renewed assault on Earth. Shinya, alongside the Space Knights organization, must confront this threat while uncovering the mysteries surrounding the Radam's origins and their connection to the Tekkaman system. The series introduces new Tekkaman warriors, including Tekkaman Evil, a formidable antagonist who challenges Shinya both physically and psychologically.

Key characters include Shinya Aiba, the reluctant hero burdened by his new role; Pegas, the AI that provides guidance and support; and Miyuki Hamaguchi, a scientist and member of the Space Knights who plays a crucial role in the fight against the Radam. The series also revisits characters from the original series, such as Noal and Aki, who provide continuity and depth to the story.

The plot is driven by intense battles, moral dilemmas, and the exploration of Shinya's growth as a warrior and individual. The series maintains a focus on the high-stakes conflict between humanity and the Radam, while also addressing the personal struggles of its characters. The narrative builds toward a climactic confrontation that tests Shinya's resolve and the limits of the Tekkaman system.

"Tekkaman Blade II" expands on the lore of its predecessor, offering a compact yet impactful continuation of the story. It balances action, character development, and thematic depth, making it a noteworthy entry in the Tekkaman franchise.