Wanting to get closer to his Yui, a bookstore clerk, Yamada buys up books he never reads. But when he decides to return to his hometown for work and is about to be separated from Yui... She takes him to the back of the store, saying, "I have a book I recommend." As he reads the erotic novel she gives him, she starts whispering dirty words into his ear and playing with his whole body. Ever since that day, he can't get Yui's dirty words out of his head, so he heads back to the bookstore where she works...