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 got enough of your type in 
the 17th volume of Oishinbo!
¡Ya tuve suficiente de los tuyos 
en el volumen 17 de Oishinbo!
Já me cansei do seu tipinho 
no volume 17 de Oishinbo!