Najica Blitz Tactics is a 12-episode anime series set in a near-future world where advanced humanoid androids, known as Humaritts, coexist with humans. The story centers on Najica Hiiragi, a skilled perfumer and covert operative for the intelligence agency CRI. Najica is recruited for her exceptional combat abilities and sharp instincts, tasked with neutralizing rogue Humaritts that pose a threat to society. These androids, designed to resemble humans, often malfunction or are reprogrammed for malicious purposes, leading to dangerous situations that require Najica's expertise.

Najica's missions frequently involve high-stakes action, espionage, and tactical combat, showcasing her proficiency in firearms, hand-to-hand combat, and strategic thinking. Her partner in these operations is Lila, a mysterious Humaritt with advanced combat capabilities and a childlike personality. Lila's origins and true purpose remain ambiguous throughout much of the series, adding an element of intrigue to her character. Despite her artificial nature, Lila develops a bond with Najica, who initially views her as a tool but gradually comes to see her as a companion.

The narrative unfolds through episodic missions, each presenting a new rogue Humaritt or threat that Najica and Lila must confront. These missions explore themes of humanity, artificial intelligence, and the ethical implications of creating beings that blur the line between machine and human. The series balances action-packed sequences with moments of introspection, particularly as Najica grapples with her evolving relationship with Lila and the moral complexities of her work.

Supporting characters include members of the CRI, such as Gento, Najica's handler, who provides mission briefings and logistical support, and other agents who occasionally assist in operations. The series also features antagonists who exploit Humaritts for personal gain or ideological purposes, further complicating Najica's missions.

Najica Blitz Tactics combines elements of science fiction, espionage, and action, with a focus on the dynamic between its two central characters. The episodic structure allows for a variety of scenarios, from urban skirmishes to elaborate heists, while maintaining an overarching thread of mystery surrounding Lila's true nature and the broader implications of Humaritt technology. The series concludes with a resolution to Najica and Lila's partnership, leaving room for interpretation regarding their future and the evolving relationship between humans and androids.