A few years after being married... Hibiki is doing her best to be a "good wife" to her husband, but the distance between her and her husband is only widening, and she is worried about how to return to her original life. One day, Hibiki meets Aoi, the husband of a friend who lives in the neighborhood. And while talking about each other's problems, the distance between the two gets closer and they commit infidelity for the first time in their lives. however