24 Hour Lover (1968)

Georg is a charming womanizer, but one day he takes it too far: he seduces not only a colleague, but also one of his brother's students, dangerously jeopardizing his plans to become the school principal. In order to finally bring the incorrigible Casanova to his senses, the family decides that he must be married immediately. Georg, who sees through the plan, makes fun of it and from then on brings a different lady home every evening, whom he introduces as his "bride."