Someday's Summer: A Campus of Love at Dusk

Original title: いつかのナツ　愛欲の夕暮れキャンパス

His only daughter, Setsuko died in an accident, and his gran-daughter Natsu left home to live with her couple, leaving only Hitoshi in Kimoto's house. His wife has also already left this world. The title of the TV release was "College Girl and Beautiful Mature Woman Can't Say Anything". (Sequel of "Someday's Summer: Free-spirited Female College Students").