This is a nice start. So are both Natsumi and Naruto both the main characters?

Will they both be prodigies or just Natsumi while Naruto is like canon? (don't have to answer I can wait to see).

It is nice to see one that seems like a family story and Naruto is not pushed aside. It is very rare to see a story where Naruto is not pushed aside and forgotten about.

Great story :)