Gintoki and Takasugi reveal to each other what they've been doing over the past two years, and decide to go save the one thing they never managed to save in the past: their teacher.
If so, why carry that around like 
it's some precious treasure?
لماذا إذًا تحمل معك ذلك وكأنّه كنز ثمين؟
Entonces, ¿por qué conservas eso
con tanto cuidado?
Nesse caso, por que vive tendo tanto
cuidado com isso em suas mãos?