Who is Tonkatsu? 

Tonkatsu is a greasy leftover piece of pork cutlet. Tonkatsu works desperately to convince people he is a piece of edible food. To do this, he often adds condiments like ketchup and soy sauce on himself. Sumikkogurashi (すみっコぐらし Sumikko Gurashi) are the characters living a quiet and solitary life in a corner. They might be able to settle down when in their corners, but they don't like being in the center of the room. Whenever taken to the center of a room, they always rush back to a corner.