"Hey, this is the first time we've talked, isn't it?" "U-um, yes..." "We're the same age, so let's get along." A single secretary, Aoi (Kano Koishii), and a married office worker, Yuria (Mami Sakurai). They were merely acquaintances at work, but gradually grow closer after a certain incident. Aoi struggles with an affair with her boss, while Yuria suffers from her husband's infidelity. From that day on, their lives slowly spiral into a tangled, messy entanglement.