Najica Hiiragi is a noted perfumer for CRI Cosmetics, famous for being able to identify over 500 scents. As the series began, she is struggling to finish "The Day Series" (a series of scents modeled after the days of the week), trying to find the perfect scent for the final perfume, "Sunday".   Secretly however, Najica is actually a field agent for CRI's Intelligence Bureau, an agency unknown to the public (and even to most of its own employees for the sake of their own protection). She is an expert markswoman with her preferred weapon; the Stechkin APS, an old Russian firearm with selective fire (auto and semi-auto) and a wooden holster that doubles as a shoulder stock. The twenty round magazine is loaded with non-lethal plastic bullets.   Najica is also an expert helicopter pilot, and she has a custom-modified Mil Mi-35 Hind assault helicopter with remote control and advanced avionics.   Najica's first mission in the narrative is to recover a Humaritt (Humanoid Android) codenamed "ZZZ" and referred to as "Lila" (who was to be used as the sex toy of a bi-sexual countess), Najica becomes suspicious when CRI Intelligence is contracted by Shinba Industrial to recover more lost and possibly rogue Humaritts; especially since most of them are in the hands of criminals, revolutionaries, guerillas or terrorist groups. Her suspicions increase when Lila is assigned to be her partner, even though Najica insists she be allowed to continue working alone. As time goes on however, Najica begins to trust Lila, even if Lila's lack of social graces make her wince. Soon however the two's bond is tested when they face the creator of the Humaritts and her ultimate plan...   (Source: Wikipedia) 

Najica Hiiragi, perfumer and secret agent, is sent out on a number of recovery missions to round up rogue humaritts, androids with combat abilities. Najica is assigned a humaritt partner, Lila, whom Najica is to groom as an agent and receive assistance from along the way. As Najica grows to accept Lila, each new mission they embark on reveals more and more about the capabilities and mysterious origins of the humaritts.
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(Source: Anime News Network)

With 17% of the earth's surface submerged in water, Najica lives a double life, as both a skilled perfumer and an operative for the secret intelligence organization CRI. Her undercover partner Lila is a Humaritt, an incredibly lifelike android with abilities beyond those of normal humans. While Lila may have the skills she still lacks the knowledge of how to act correctly and normally within the real world. Najica and Lila go on dangerous and action-packed missions for CRI and slowly begin to discover the secrets of what Humaritts are and what they were built for...<br><br>(Source: Anime News Network)