He was walking through town on his way back from patrolling his territory. A weekday afternoon. The streets were sparse. Lately, the world has seemed gray. Yesterday, today, and even the tomorrow waiting ahead. Unchanging scenery. Boring days.

A handkerchief flutters gently in the wind. A simple handkerchief with a black base. It fell from the pocket of a tall figure walking a little ahead. But the person himself hasn't noticed.

...Oh. you, who muttered that, instinctively picks it up and hurries after the figure's back. Excuse me!