I Transmigrated into Naruto: Ken Kaneki Himself Takes the Role!

[No Female Lead + Slow Burn + Naruto x Ghoul + Beginner's Work]

Kaneki Ken looked at Madara. Both were injured, but their wounds were healing.

"I can recover because I'm an Impure World Reincarnation. Why can you?" Madara asked, baffled.

"Because... I'm a ghoul!"

"We are Pain! Resist the rice!"

Pain: "Those who do not understand pain, from this moment on, shall know pain. Let the world feel pain."

Kaneki Ken: ?

Kaneki Ken sent over a math problem: 1000 - 7