Silver Nina(2012)

Shirogane no Nina

Shimazaki Shutaro goes back home to the country, after losing his job in Tokyo. To his surprise, when he opens the door to his family home, he finds a beautiful little girl with silver hair and blue eyes. Taking place in a city on a plateau, a tired young man and a beautiful half Japanese girl bring you a story of the slow, calming life in the country!!

(Source: Crunchyroll)