Naito is a serious school girl who works as a librarian.One day, on her way to school, she meets a lewd and consults her teacher, Kozuka.In fact, Kozuka, who was the culprit of the lewd, violated Nato in the library.She can't raise her voice and she's just as she is.Since then, daring filth begins on trains and in libraries where students are.She finally trains Naito's body, in front of the person she likes...