Dogs: Bullets & Carnage OVA

It is sometime in the future, where a certain European city extends far underground, even secret, dark levels that have the key to the past. Ex-assassin Mihai has returned and is living with Kiri, who now runs a resturaunt. Sword-wielding Naoto, Haine (white hair), a mysterious product of genetic engineering and his sometime partner Badou (eyepatch). (Source: ANN)