Mayuri's card from Naruto.
“Jiraiya, you can no longer keep up with the times! In this world, only Haruki can understand me.”
—— Orochimaru
In a world steeped in ninjutsu, war, and ancient traditions, genius isn't always measured by strength alone.
After dying from overwork shortly after graduating from medical school, a young doctor is reincarnated into the Naruto universe — reborn into the famed Nara clan as a six-year-old named Nara Haruki. Armed with memories of his past life and a unique golden finger — a "Talent Card System" that grants abilities from other worlds — Haruki awakens the rare talent of Kurotsuchi Mayuri, a mad scientist from the Bleach universe.
Unlike the usual shinobi path of strength and battle, Haruki carves his own route through the realm of science, biology, and neurology. His destiny is not to become the strongest fighter, but the most brilliant researcher. With the legacy and intellect of the Nara clan behind him, and his own obsession to surpass the genius of Urahara Kisuke, Haruki begins a quiet revolution — blending forbidden research, scientific advancement, and shinobi tactics in ways no one has dared before.
As the world plunges into chaos, and the forces of old and new collide, one thing becomes clear:
Orochimaru, the rogue genius of Konoha, has found a kindred spirit in Nara Haruki.
And together, they may very well reshape the shinobi world.