Eros Schedule Book: Concubine Secrets, or Sensual History: Shogun's Harem Secret Story, or Castle Orgies (色暦大奥秘話 Shikireki ōoku hiwa) is a Roman Porno film directed by Isao Hayashi and starring Setsuko Ogawa. With Apartment Wife: Affair In the Afternoon, it was part of the first Nikkatsu Roman Porno double-feature. Both films were inaugural entries in film series. Indicative of the two directions in which Nikkatsu intended to aim its new erotic film series, the Apartment Wife films depicted the lives of contemporary common people, while the Eros Schedule Book series films were period pieces set in historical times.