Can someone explain to me wht just happened. I'm sorry I'm slow sometimes.

Hijikata had to piss but Gintoki teased him and asked if would he cum or piss first, Hijikata firstly came and then he pissed. But it was actually a dream, then he actually went to take a piss but aşş those things that happened in his dream is going to happen next.

deja-vu