Nakagawa Arisu is in the 3rd grade of high school and 18 years old. Her mother died when she was 11 years old. She has since lived with her father, who works as a firefighter. Having been influenced by her mother, Nakagawa Arisu has dreamed of becoming a curator who travels abroad often for work. But her life changes when she learns she is pregnant.

Meanwhile, Naruse Toko is about to turn 40 years old soon. She works in the art world as someone who connects art and business. Naruse Toko is dedicated to her work and she hasn't been in a romantic relationship for 10 years. Nakagawa Arisu and Naruse Toko, who are totally different people, happen to meet and their encounter changes their lives.