Kaoru and Shunsuke are a couple who are not getting along. Kaoru is dissatisfied with her daily life, when suddenly "the extraneous matter" arrives in front of Shunsuke and Kaoru... Meanwhile, at the cafe where Tomomi works, two former lovers, Koudai and Mina, arrive. They begin to talk with a mysterious look on their faces while puffing on cigarettes.... A few months later, Ryu, who works at the factory, finds something and goes with Misato, a clerk, to make a request to Takeshi, the factory manager. One year has passed since the "the extraneous matter" appeared to Kaoru. Kaoru goes out to a bar and meets a mysterious woman.