After the reopening of Tsuki no Yu bathhouse owned by Kanae Sekiguchi, her husband Satoru remains missing for four months since his departure on a business trip. With no clues to his whereabouts, Kanae speculates between two possibilities: a secret affair or a tragic accident, leaning towards the former. To support her in running the bathhouse, The Public Baths Union dispatches Mr. Hori as her aide. Amidst managing the bathhouse's affairs, Kanae navigates a cascade of appointments that could potentially shed light on the mystery surrounding Satoru's puzzling disappearance.