The film tells the story of an ordinary housewife who receives an email from a beautician, which triggers a series of stories. The housewife Sayoko is played by Tokiwa Takako, and the beautician Kaito is played by Ikematsu Sosuke. In addition, Sayoko's husband Kotaro is played by Katsumura Masanobu, and Kaito's lover Yui is played by Satsukawa Aimi. The theme of "Whose Xylophone" is the resonance between women's spiritual hunger and alienation in modern times when the connection between humans is gradually fading, and the men who have to confront them.