As one of the world's top perfume designers, Najica Hiiragi works with her trusty assistant Kirala to develop the Day Series perfumes for CRI Cosmetics. But Najica has another job, one that few ever see; she is also a secret agent for the CRI intelligence organisation. However, Najica's life gets even more complicated when she rescues a young girl from the clutches of a depraved socialite and her machine-gun wielding maids.