It was Taisho Era. Morisaki Shinichiro and the little sister-in-law were building a cafe that his dead mother had left. His father had been an outstanding scientist, but he soon began to absorb in studying "android". People begun to cast cold eyes on him, and lastly, he disappeared. Next, they two lived poor lives. One day, which has a loud noise, an android girl dropped smashing the ceiling from the cafe. Then, their peaceful life suddenly will

This is a story about one of the girls a secret detective Agency "Crimson Girls". One day while investigating a case of pristaval in trains, she becomes a victim. What would be impregnable was a girl maniacs will find a way to break her spirit. So loses her virginity the first girl from "Crimson Girls" who next?