Yamada had been buying countless books without reading them, all in an attempt to get closer to Yui, the bookstore clerk he admired. But with a job transfer forcing him to return to his hometown, the day of parting with Yui drew near. That day, she whispered, "I have a recommended book for you," and led him to the back of the store. As he began reading the erotic novel she handed him, Yui breathed lewd words into his ear and started caressing his entire body. Haunted by her words that night, Yamada returned to the bookstore. Their relationship was about to take a bold new turn.