One Seal To Rule All

One seal to stop time and shatter space.
One seal to change reality.
One seal to erase the universe.
One seal to rule all.
...
Eren, a young scientist of Earth, died in an accident and was reborn in the world of Naruto. How could he survive such a world with no exceptional talent in combat, no bloodline, and no chakra or cheat?
With his genius and pragmatic mind, of course.
After all, Fuinjutsu is something that has infinite potential.
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A realistic story, with no plot armor. Extremely smart MC.
Multiple worlds... begins in Naruto.
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