Yes this is a comic Pannel.

It's too smol DDDD:<<<

It's been a long time since they've done this.

After they face their biggest threat [REDACTED] they've been having a rough time. Especially Caesar, he feels responsible for putting his little brothers in danger and needs to give Vincent some head pats to feel better, Francisco makes them s'mores putting the marshmallows on his shell to roast them while he feels the warmth :) and Hokusai is tired and enjoys getting head scritches from Vincent while he questions about like and thinking about his brothers mostly.

But what could've happened to make them revisit the old days?

I mean...they've stopped after they turned into teenagers...but. They decided to do it again to "revisit what we missed back then before it's too late" what could that possibly mean..?