"Burst Angel: Infinity" is a two-episode OVA that serves as a prequel to the original "Burst Angel" series, providing backstory and context to the events that unfold in the main storyline. The narrative is set in a near-future Japan where crime and lawlessness have escalated, leading to the rise of private security firms and bounty hunters. The story centers on Jo, a skilled and enigmatic gunfighter, and her companions as they navigate a world of corruption, violence, and moral ambiguity.

The OVA begins with Jo, a young woman with a mysterious past, working as a bounty hunter in Tokyo. Her exceptional combat skills and stoic demeanor make her a formidable figure in the criminal underworld. Jo crosses paths with Meg, a brilliant but socially awkward hacker, who becomes an integral part of her team. Together, they take on dangerous missions, often targeting powerful criminal organizations. The dynamic between Jo and Meg is a focal point, highlighting their contrasting personalities and the growing trust between them.

The plot delves into the origins of their partnership and the formation of their team, which later includes Sei, a former assassin, and Amy, a cheerful but deadly explosives expert. The OVA explores the challenges they face as they confront corrupt officials, ruthless mercenaries, and advanced weaponry. Themes of loyalty, survival, and the cost of violence are woven into the narrative, providing depth to the characters and their motivations.

The setting is a dystopian version of Tokyo, characterized by urban decay and technological advancements. The OVA maintains a balance between action-packed sequences and quieter moments of character development, offering insight into the protagonists' backgrounds and the circumstances that shaped them. The story sets the stage for the events of the main series, establishing the foundation for the relationships and conflicts that drive the overarching plot.

"Burst Angel: Infinity" serves as an effective introduction to the world of "Burst Angel," providing context for the main series while standing on its own as a self-contained story. The OVA's concise runtime ensures a focused narrative, making it accessible to both new viewers and fans of the original series.