No, not the Japanese flag.
It is the elusive Laser Dot.
The Laser Dot holds a certain mystery for Mouth because it is the one thing he has never been allowed to catch.
He seeks it here. He seeks it there. That tabby seeks it everywhere.
The Laser Dot is Mouth's own personal Scarlet Pimpernel.
It can scale walls; it can traverse the ceiling. There are no limits to its paw-evading capabilities.
It maintains a deadly alliance with Watch Face Reflection, which is more skittish by nature and seems only to appear in sunny weather.
Often, Mouth will pounce victoriously, convinced that he has managed to trap the LD this time.
But when he lifts his paw, it is nowhere to be found.
It breaks Mouth's poor little mind.
Sometimes when he is sleeping, Mouth will clasp his paws together and make happy faces. We think he dreams about catching the LD once and for all and showing it who is boss.
When he wakes up, it seems to dawn on him that the enemy remains at large.
For Mouth, the Laser Dot is the holy grail. It is the pot of gold at the end of the rainbow.
Well, ambition is a healthy thing.