The anime you might be referring to is "Isekai Nonbiri Nouka" (also known as "Farm Life in Another World"). In this series, the protagonist is transported to another world where he starts a new life, which includes living with women and forming a family. It has elements of romance and some mature themes. If this isn't the one you're thinking of, please provide more details, and I'll try to help you identify the correct title.


