Devils Line
デビルズライン (original)
In a world where devils blend in with the rest of human population, half-devil Anzai uses his devil-born gifts to protect Tokyo from vampire-related crimes. His strong will of never drinking blood becomes severely tested when he falls in love with the girl he rescued from a devil's attack. Will Anzai be able to resist the urge of his demon instincts?
Starring Yui Ishikawa, Yoshitsugu Matsuoka, Takahiro Sakurai, Miyuki Sawashiro, Yoshimasa Hosoya, Ryohei Kimura, Hiroshi Kamiya
Watch "Devils Line" from streaming services Hulu Plus, Amazon released in 2018. It's a animation and action & adventure show, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of show.