It might be about a lost dog looking for its home in the alleyway and having all kinds of adventures.
Maybe it's a brave dog that got injured in an adventure and now wears the eyepatch as a symbol of its courage.
The story could be that the dog was in an accident and is learning to cope with its new situation. It might make friends along the way who help it regain its confidence.
Maybe the dog got into some kind of adventure that made its nose turn red. Or it could just be a unique feature to make the dog stand out in the cartoon.
It might be a rescue mission where the dog is trying to find its owner or help others escape.
Perhaps the briefcase holds something special for the dog, like treats or a toy. Or it could be that the dog is a secret agent on a mission, and the briefcase contains top-secret information.
Perhaps the dog is on a mission to save a distant planet or discover a hidden treasure in space. Maybe it got lost and is trying to find its way back home.
Maybe the Cerberus dog is going on a journey and has packed its essentials in the suitcases.
The story might involve the dog being separated from its owner when the house catches fire and its efforts to reunite with them. It could also be a mystery as to how the fire started and the dog plays a role in solving it.
An alleyway cartoon typically showcases detailed backgrounds with brick walls, maybe some graffiti or trash cans. The characters might be shown in a tense or cautious mood due to the secluded space.
Many things could happen in a back alleyway. It could be a place where stray animals seek shelter. For example, cats might hide there from the rain or dogs might find a quiet corner to rest.