The Twelve Kingdoms
十二国記 (original)
A high school student is approached by a stranger, claiming he's been searching for her because she is the rightful ruler of his kingdom.
Starring Takehito Koyasu, Kenichi Suzumura, Rie Kugimiya, Kappei Yamaguchi, Yuji Ueda, Naomi Wakabayashi, Kousuke Okano, Masaki Aizawa, Aya Ishizu
It's a animation and drama show, and has a rating of 7.9 out of 10 from Imdb which is usually fine for this kind of show.
Watch it here
Not found streaming from United Kingdom.