He's starting to loose sleep.
He's also lost his appetite.
Kuranosuke doesn't really know why but a single question has been bothering him for almost a week now.
He unwisely, accidentally, blurts it in front of Hanamori one day. And he regretted it instantly. Kuranosuke was prepared to walk out and pretend that nothing happened but Hanamori had a spark of interest in his eyes that was usually reserved for German manufactured automobiles.
"What does your brother have that you don't?"
The second son of the Koibuchi family swiftly turned around and started shaking his brother's driver. "FORGET IT! YOU HEARD NOTHING! NOTHING AT ALL!"
"Eh? But isn't it obvious?"
"I-it is?"
Hanamori nods at him with the solemnity of someone who had found the answers to life's most elusive questions.
"What you don't have, but what your brother has, is a cool, good looking, suave driver and a Benz."
Kuranosuke knocks him out with a head butt.