When they meet with a traffic accident, Gintoki and Hijikata miraculously escape without a scratch, but their souls end up switching bodies. With no means to return to normal, Gintoki has to live as a freedom-loving Hijikata, and Hijikata as a Gintoki who stresses strict discipline. The change in these two leaders transforms the Shinsengumi and Odd Jobs into completely different organizations.
W-Wait a second, Vice Chief! 
I've never even heard of such a code!
تـ... تمهّل قليلاً أيّها النائب! لم أسمع بقانون كهذا من قبل
¡Un momento, subcomandante!
E-Espere um pouco, tenente! 
Nunca ouvi um código desses!