"Everyone looks pretty grown-up after summer break"
Shinpachi finds himself in stuck in a completely different world.  That is when the Shinsengumi sends a berserk Yamazaki to pick up the bewildered Shinpachi.
I'm guessing that you know what I'm talking about.
Creo que sabes de lo que estoy hablando.
Acho que você sabe 
do que estou falando.