"Using complex Yin-Yang Release techniques as a shell to conceal the extremely simple Caged Bird curse mark inside.
"The two have nothing to do with each other, so of course no one could find a way to undo it."
"But even if someone discovered how simple the Caged Bird curse mark was, they still wouldn't succeed.
"They would have to conduct extensive research, just like we did, to unravel it piece by piece and see the entire curse mark."
As Orochimaru spoke, he couldn't help thinking of the research he'd done before, and a sense of accomplishment welled up in him.
The appeal of research was precisely what had made Orochimaru so engrossed in it.
The long process of research: gathering information on the Hyuga, then going so far as to steal corpses and deceive wounded soldiers on the battlefield.
At last, he had finally reaped a result that no one had managed to achieve in a hundred years.
Watching the reflective Orochimaru, Yayoi couldn't help smiling as well.
His agreement with Rin was almost fulfilled. Soon, he'd be able to ask her to pay him back for the materials.
And although Orochimaru made it sound easy, the Caged Bird was a core secret of the Hyuga Clan.
Even the Caged Bird control seal, which was relatively simple on the inside, wasn't easy to undo.
The hardship involved had made it a grueling task.
"I can give you the method to undo it."
Orochimaru licked his lips as he looked at Yayoi.
"But, Miyoshi-kun, what are you going to give me in exchange?"
"Our research results are nowhere near equal right now. You're making this difficult for me."
"Lord Orochimaru, you jest. Since you've made progress on the Caged Bird, I'll naturally share some of the Hyuga Clan's research results