: Yosuke’s college-aged son from a previous marriage. He is initially cold and distant toward his stepmother.

: Misako Amamiya has been married to her husband, Yosuke, for one year. On the surface, they appear to be a happy, stable family: Yosuke is a successful businessman, and Misako is a devoted housewife. The Conflict : Despite her efforts at home, Misako is deeply sexually frustrated

: The mysterious caller explicitly targets Misako's hidden vulnerabilities, forcing her to confront her suppressed desires.

The premiere lays the groundwork for future storylines, including the introduction of Misako's younger sister, Emiko, which expands the narrative into a more complex, volatile family conflict later in the series.

Originally released in Japan on November 25, 2003, the English-language version of Episode 1 was also produced, ensuring the series reached a wider international audience.

Misako is the heart and soul of the first episode. She is presented not as a one-dimensional seductress, but as a deeply human, sympathetic character. Voiced by Nagisa Futami (under an alias), Misako is beautiful, young, and full of life, yet her spirit is being slowly crushed by a marriage devoid of passion and a family that keeps her at arm's length. Her motivations are clear and relatable: she craves intimacy, affection, and fulfillment—things her husband is incapable of providing. This is what makes her such a powerful figure. The audience understands her loneliness and frustration, which makes her eventual fall from grace feel less like a simple moral lapse and more like a tragic inevitability.