A married woman who had an affair in retaliation for her husband's infidelity. Her husband is the owner of a beauty salon and interacts with many female customers. Apparently, Ms. Shinomiya was worried even before marriage that her husband might be cheating on her with his female customers or staff, but they somehow managed to avoid any infidelity incidents. However, one day while cleaning the room, she discovered an unused toothbrush. And on the toothbrush's packaging paper was the name of a love hotel…
