One night, as the city slept, evil spirits known as the “Miasma” emerged from the shadows into the empty streets, bringing disaster to the people. The protagonist, Shinobu Kisaragi, is publicly an employee at a detective agency, but secretly, she is an agent of an organization that exterminates the Miasma. Each, she fights the Miasma that emerge from the shadows. What dangers await her…?

One night, as the city slept, evil spirits known as the “Miasma” emerged from the shadows into the empty streets, bringing disaster to the people. The protagonist, Shinobu Kisaragi, is publicly an employee at a detective agency, but secretly, she is an agent of an organization that exterminates the Miasma. Each, she fights the Miasma that emerge from the shadows. What dangers await her…?