Sachiko is a young woman that lives in contemporary Japan in a town named Nagoya. She was riding the subway one day when a man named Mamoru, a university professor, reached out to her, mistaking Sachiko for his dead wife, Ayumi. After realizing his error, Mamoru presented Sachiko with an unusual proposition: he would pay her to dress like his late wife and accompany him on trips, without requiring any sexual favors in return. Sachiko accepted. Her rendezvous with Mamoru represented a seismic change of pace in her life. Normally, she worked long hours at a creperie and came home to her volatile boyfriend Ichiro. With Sachiko, she created a new, second life for herself. However, the permanence of this life is threatened by Sachiko's revelation that she is in love with Mamoru. On a trip together, Sachiko decides to reveal her feelings to Mamoru by alluding to her willingness to give him more than he's asked for. Mamoru is made uncomfortable by Sachiko's suggestion, prompting the young girl to realize that she will never be able to take Ayumi's place. After the unfortunate confrontation, Mamoru watched Sachiko sleep, mourning the mutability of the world and how he's inflicted his pain onto love-stricken Sachiko.