The Sasaki family is as elite as it gets, and one of its members, Tetsunosuke, has joined the Shinsengumi.  He would have joined the Mimawarigumi, a police force with pedigree, but he is considered a troublemaker, which is why he was sent to the Shinsengumi.  Kondo assigns Tetsu to Hijikata as an assistant, so Hijikata is forced to endure the new recruit...
I've said goodbye to my 
old self and started anew!
me despedí de mi antigua manera 
de ser y comencé desde cero.
disse adeus a quem eu 
era e recomecei do zero!