The ending theme song is: "The Source of Love" by Hiroko Kasahara
Although it has characters and follows the story lines of Rurouni Kenshin, this OAV was released under the title Samurai X.
Saitou appears in Karou memories but has no dialoge.
Japanese Title: Rurouni Kenshin - SeisouHen (part 1)
Originally aired in Japan on December 3, 2001.
First appearance of the adult Enishi Yukishiro, Kenshin's brother-in-law (in the manga, Kenshin and Tomoe were actually married). This brief appearance, as well as most of the second episode, is a truncated version of the third arc of the Kenshin manga. In that, Enishi and a gang of fighters seeking revenge on Hitokiri Battousai set out to systematically destroy everything in Kenshin's life.
This whole ova episode is a group of memories that Karou is remembering. One of the memories is the infamous battle with Kenshin and Tomoe's younger brother, Enishi.