Yamada buys books that he doesn't even read because he wants to get closer to the bookstore clerk he admires, Yui.However, when it is decided that she will return to her parents' home due to her employment, and finally she will be separated from Yui ….She says, "I have a recommended book for you," and takes her to the back of her shop.So while reading her erotic novel that she gave me, she whispered her dirty words in her ear and played with her whole body.Since that day, Yamada's girlfriend Yui's obscene words have stuck in her head, and she heads to the bookstore where she works again...