Rich men dying mysteriously create good income. Rich men dying mysteriously in rooms locked from inside create better. They begin through the man's possessions that evening.

When Naoto starts nodding into a pack of letters, Yousuke looks at the clock.

"Let's stop for today," he suggests.

Naoto mutters a refusal.

Yousuke barely thinks. It just seems right, in that moment, to steal Naoto's cap and don it himself. "You're not fooling anyone," he says, headware balanced precariously. "Besides, you're not gonna catch anything important this tired, right?"

Naoto stares at him like he's lost his mind.

Yousuke returns the cap.