Garo: The Animation
牙狼<GARO> -炎の刻印- (original)
The Makai Knights protect humanity from demonic entities known as Horrors. But the King's advisor seeks to eliminate the Knights and banish the heir to the throne. In order to save his people, the Prince seeks the aide of the legendary Golden Knight!
Starring Katsuhito Nomura, Natsumi Tada, Mayu Udono, Mari Doi, Madoka Aiba, Kenyu Horiuchi, Daisuke Namikawa, Romi Park, Takaya Hashi, Hironobu Kageyama
It's a animation and drama show, and has a rating of 6.7 out of 10 from Imdb which is usually fine for this kind of show.
Watch it here
Not found streaming from United Kingdom.