The sexy main female is chloroformed in a parking garage by someone dressed as a janitor. The 'janitor' turns out to be another sexy woman.
Found by Nephenthal
Rio Momose (百瀬莉緒) is one of the available idols in the mobile game THE [email protected]: Million Live!
This image was taken from the mobile game. It's a spy themed image
Name of the story is 'Lets Try Dueling'. The main character's sister, Addy, is kidnapped by a rival. She is shown unconscious, and then slowly waking up. The gang tries to gag her, but she puts up a fight.
Contributed by IeonScans