Confidential Infiltration: The Code of the Shinsengumi!.Upon seeing the plight of the people of Kyoto under the tyranny of the new shogunate up close while hiding in the blacksmith, Katsura vows that he will turn back Mugensai's timer and free the city's people from their fear as soon as possible. That's when Shinsaku declares he has an idea and he comes up with a plan for Katsura to join the Shinsengumi! Katsura's skills during a swordsmanship test impresses Kondo, Hijikata, Okita and the others and becomes a member of the Shinsengumi where his false life begins.