Vanny Knights(1999)

Vanny Knights is an anime series following Fujita Kazuyuki, an otaku who discovers he carries the Millennium Saber and is the reincarnation of legendary hero Arest Horn. When the demon organization Amore Gore emerges to seize the saber and conquer the world, three girls—Arisu, Airi, and Akira—mysteriously enter Kazuyuki's life. The trio transforms into the Three Musketeers of Arest Horn, sworn to protect him until his true power awakens. Blending comedy with action and magical girl elements, the series follows their efforts to defend Kazuyuki while uncovering the secrets of his legendary past.