The Dark-Hunters Vol. 3 (manga)

Talon, an ancient Celtic warrior, has been cursed by the god Camulus for killing his son. Camulus cursed Talon, decreeing death for everyone he loved. Now a Dark-Hunter in modern-day New Orleans, Talon meets Sunshine, who is key to ending his curse once and for all. Not to mention helping him to save New Orleans from an ancient god bent on total destruction...