The end of the year is traditionally a time for reflection.
Watanuki isn’t generally one for such introspection, but he’s been known to lapse into the occasional contemplative mood.
Note not just the furrowed (and furry) brow, but also the elegantly crossed paws symbolizing deep thought.
Granted, in his case, it’s likely to be thoughts of mischief and/or thuggery.
But at least he’s thinking, rather than doing.