Porno Sakka Mayuka to, Injuku Miboujin to Katabutsu Henshuusha to Ubu Gishi

Moving into a new apartment with his step sister, the protagonist is starting his new job as editor. His first assignment is to be assistant to famous author in helping with her new book. To his surprise the author is a romance/erotic writer that he is a fan of. Only to be disappointed to find out her true character is bossy and rude. One day he is given orders to go to her apartment at night time which he is then sexual assaulted without fully comprehending it. She tells him he is a great model to use for her next book being a weak will man and wants to keep using him to help with her new book.