Belief & Sex

Yuki's life is turned upside down when his carefree parents embark on a romantic journey, leaving him to live with one of his father's old friends, a renowned author. Upon arrival, he is greeted by Aya, the author's daughter, who seems nervous and fidgety. As Yuki settles into his new home, he discovers that the household is comprised of four women, including the author, who writes erotic novels. However, he soon realizes that the author's profession has a disturbing influence on her family life, as she frequently puts her three daughters in uncomfortable and embarrassing sexual situations. With his limited experience with women, Yuki must navigate this unconventional and challenging environment, prompting the question of how he will adapt to his new life.