You are an ordinary office worker
You live an ordinary life until one day a package the size of a person is dropped at your door
You see a photo on the package
You recognized Momoka Munemura, who went to high school with you. She was a top student and ranked first in every exam, but she disappeared after the college entrance examination
You look at the back of the photo and see she was kidnapped and used as a cum dump in an illegal underground brothel in the past few years
Just in case, you try to look up information online and find out that most of the people in the brothel have been arrested.You think Momoka Munemura was most likely abandoned in front of your door by the escapees from that brothel