The Legend of Zorro (anime series)

 is an Italian-Japanese anime, based on the western character Zorro. 
Plot.
Diego Vega, the eighteen-year-old scion of a local landowner, returns from studying in Spain and discovers that his homeland has fallen under the dictatorship of Commander Raymond and Lieutenant Gabriel. Outraged by the oppression, Diego decides to fight the tyrants. Disguised as Zorro, a masked swordsman, he helps the weak, riding away on his horse, Viento.
In his day-to-day life, Diego portrays himself as a clumsy and cowardly boy who flees when faced with dangerous situations only to appear moments later as Zorro. As the local hero, he is known to punish his enemies by cutting a "Z" shaped mark into them with the tip of his blade. Diego is accompanied by Bernard, his sidekick, who wears a similar costume and has the nickname "Little Zorro."
Diego's childhood friend and sweetheart, Lolita Prideaux, believes that Spain changed him and she scolds him relentlessly for his idiotic behavior. Lolita is a sweet-tempered girl who wants to fight evil and protect the people by helping Zorro from behind the scenes. She later develops feelings for Zorro, though she is unaware of his true identity.
Music.
The series soundtrack contains two pieces of thematic music. The opening theme is titled "Zorro", and the closing theme "Chikai" (誓い; "Oath"). Both are sung by Masaaki Endoh and are used for all aired episodes.