Rurouni Kenshin

Raijuta's Ambition: Dream of a Forbidden Kingdom (1x19)

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The Kenshin-gumi go on vacation in Izu. There, a wealthy boy Yutaro falls under the influence of Raijuta, who intends to create a kingdom with his warriors. Kenshin battles Raijuta's men for the sake of Yutaro, but they gain the upper hand.