Maria is in need of money. Because her day-time job doesn't pay enough, she works at night at a cabaret. She needs the money so that she can pay for her sister, Nana's eyes operation. When both Maria and Nana were younger, Maria burned down the home, causing her sister's blindness and killing their father (mother survived.) Shiro is a famous concert pianist. However, he isn't happy with his marriage or his life in general. Maria and Shiro are united through a traffic accident, causing Shiro to be hospitalized. Faking amnesia and his identity, he stays at Maria's place and eventually starts to work at the cabaret as a piano player. As you will find out later on, life was not meant for Maria and Shiro to find one another.

Arima Takuya is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya receives a peculiar package from his missing father, along with a letter containing information about the existence of various parallel worlds. At first Takuya doesn't take it seriously, but soon he realizes that he possesses a device that allows him to travel to alternate dimensions. Is his father alive, after all? If so, where is he?

After losing her parents in a tragic traffic accident, Koto develops the ability to communicate with the souls of the dead. Hospitalized for extreme trauma, Koto escapes to return to the place where her parents died. There she meets Shinji, whose lover also died in a car accident, and they begin a torrid and tempestuous affair. The pair embark on an illicit and terrifying journey heightened by lust and death.