Bachelor with 40 children

Plot: Isidoor lives with his niece and a housekeeper in a little provincial town. One day he receives a letter: he is to be the heir of a distant and wealthy relative. There is only one condition: he has to go and live for a year in "Home lux et vita", otherwise he will loose his inheritance. The home is a home for abandoned children and now this bachelor becomes the father to 40 children...