Inside Kakuzu's temporary hideout in Amegakure.
"You stupid brat! You can't even do arithmetic, and you're talking about making money!"
"Argh, you mean old man! I'm going to become the strongest ninja! Why do I have to learn this?"
Yahiko stared at the dizzying jumble of numbers before him, his head throbbing.
"Heh, I'm not forcing you to learn. You can leave whenever you like."
Kakuzu took a sip of water from his cup and stopped paying attention to Yahiko. Instead, he looked at Nagato, who was studying diligently, and nodded in satisfaction.
Yahiko pursed his lips and glanced at Nagato and Konan, both hard at work. In the end, he obediently sat down and continued studying.
Ever since Kakuzu had exposed the brutal reality of the shinobi world to the three children that day, Nagato had made up his mind. He wanted to learn how to make money. With enough money and enough strength, he would be able to change the shinobi world.
At Nagato's urging, the three children had sought out Kakuzu and told him they wanted to learn how to make money from him, because he seemed to know a great deal.
Kakuzu had taken an interest, too, and started teaching them the basics of keeping accounts.
After all, if you couldn't even keep accounts, how the hell were you supposed to run a business or make any money?
Nagato had the patience to study accounting, but Yahiko didn't. He was naturally restless, and making him sit still and crunch numbers was practically torture.
"It's all right, Yahiko. You can leave this sort of thing to Konan and me in the future. Just focus on becoming a powerful ninja. That way, you'll be able to protect us."
Seeing how dejected Yahiko looked, Nagato couldn't help offering him