One day, Waka, who was born as the third daughter of Daisuke Ninomiya, the president of Ninomiya Construction, heads to the main house where his eldest daughter, Chizuru and his wife, live, for a family gathering. - As they are enjoying their reunion after a long time, the mansion suddenly loses power. - That night, a mysterious man invades Waka's futon as she tries to sleep in the dark. - Waka was raped because she couldn't resist the obligatory act. - Who on earth came here at night...? - At that moment, a scream echoes inside the house, cutting through the silence of the dark night.