Legends tell of an invincible martial art known as Mutsu Enmei-Ryu, an unarmed style that allows the user to defeat any number of armed opponents using incredible speed and strength. This is the story of three generations of those who bear the name Mutsu, and their encounters and battles with the strongest fighters of their era. (Source: ANN)

Two short OVA of Hakuouki distributed to those who purchased all six volumes of the DVD. A fandisc game "Hakuoki Zuisouroku" and an official parody "Hakuoki SSL (a high school parody)" were animated.

If time did not allow ordinary things to be ordinary. How would you have lived? It is the Bakumatsu and early Meiji Period. Akizuki Keiichirou and Kusaka Touma stand of opposite sides of the political scale of the time but still, something as fragile as the shell of a cicada binds these two men together in a tragic and cruel fate. A story of friendship, love and seperation as well as reunion and sacrifice. (Source: AniDB)