[2] The author received the 2007 Chūō Kōron Literary Prize (中央公論文芸賞) for the novel.

Consists of two chapters in total (3 chapters including the prologue Chapter 0) depicting the three-and-a-half-year escape story of Nonomiya Kiwako, a woman who kidnapped the baby of her adulterous partner, and the conflict of Erina Akiyama, the baby who became an adult after the incident.

Although it is suspenseful, everyday elements such as birth, love, and family are depicted in a unique way.

As the protagonist, Erina Akiyama cannot find peace with her family and starts a journey to confront her past.

She makes a life-changing decision after discovered what is important to her, which is her rebirth.