Rurouni Kenshin

The Appearance of Kurogasa: Visitor from the Shadows (1x6)

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Government officials are being murdered. Jinei, a former hitokiri known for his ruthless attitude, is doing it and the government asks Kenshin for help. When Jinei sees Kenshin, he realizes he has a worthy opponent and kidnaps Kaoru, telling Kenshin to meet him later.