*SLEEPLESS Nocturne*—the sequel to *SLEEPLESS*, an "Empress" original title defined by female dominance—arrives as an adult anime. Tomoki and Yukino find themselves invited to a bizarre sexual banquet hosted by the residents of a mysterious mansion. Tomoki is drained to the limit by the mistress of the house, Marie, and her daughter, Maria. Meanwhile, Yukino falls captive to the ecstasy inflicted upon her by Maria’s "pet," Rui. What fate awaits the pair, now held prisoner within the Black Rose Mansion?