This novel follows a working woman who decides to pursue motherhood while conscious of the limits of time. Through love, friendship, and shifting ideas of family, it portrays the urgency of choosing one's own life.

A decision about becoming a mother changes the shape of friendship and love.

Structured around the diary of a girl named Kirihara Kiriko, this linked-story novel follows a series of slightly strange people and events. It depicts the oddness at the edge of daily life with a light voice and lingering peculiarity.

Through a girl's diary, small mysteries hidden in everyday life slowly unfold.