Hakuoki ~Demon of the Fleeting Blossom~ Dawn of the Shinsengumi
The beginning of Hakuouki series, this installment tells the story of Ryunosuke Ibuki, a boy who loathes samurai while also being the son of a samurai. After being robbed and left to die on his way to Kyoto, Ryunosuke is rescued by the Roshigumi leader, Kamo Serizawa. Serizawa treats Ryunousuke as a servant and calls him a dog. Meanwhile, Ryunousuke watches as the Roshigumi slowly unravels around him.
(Source: Sentai Filmworks)