To her husband, she was merely a housekeeper. Amidst this monotonous life, she unexpectedly reunited with Hayashida, her husband's former colleague. He was now a door-to-door sales representative, and she purchased a water purifier from him. Since then, he began visiting every Thursday at 3 PM for routine water quality checks. But these visits gradually evolved into something far beyond mere maintenance. As a man who brought warmth and comfort into her lonely days, their bond slowly deepened. A story of hidden tenderness and growing passion within the confines of an ordinary life.