Slatter was not craving Shirakawa's piano skills; he was craving the future.
With this lad's talent, as long as he doesn't switch careers to fishing or bricklaying, the future is most definitely promising. If he can make his juniors establish some relationship with Shirakawa now, Slatter would absolutely approve with both hands.
But unfortunately, becoming a tutor seems impossible... there's a time difference with online teaching, and bringing the George family over to learn might risk other families finding out...
I have it tough...
Slatter thought for a moment, seeming to recall something, and suddenly said, "Young man... do you remember the piano piece you played when you and Hayakawa Kashi came to see me earlier?"
"The one I wrote."
"'River'?"
"Can you still remember that piece?"
Relying on his Little Arrogant's photographic memory talent, Shirakawa Sawahei nodded calmly.
"Then play it for me."
"Is there a piano nearby?"
"Follow me..."