1 naruto runs away but leaves a clone of himself that went into a coma so no one would know the truth about naruto left the village but if naruto was to ever come back he would show them what he is now.

2 His family neglected him for his younger siblings, who have the yang/yin powers of the Kyuubi as naruto have the soul when Naruto finds out his mother had another baby, he left and was not seen for 20 long years.

When boruto finds tape recorders under the floor of naruto od bedroom, he and his other family members listen to them where it might be the key to find out where is naruto.

3 naruto was beating to near death at five that when he first meets the Kyuubi they become too good friends fast, they made a deal as well were Kurama can take over one demon clone of Naruto and looks like as a five-year boy, the two become now brothers and pull pranks on the village and have fun, they both find a new home in a den as Naruto didn't want to live with his family anymore, the two soon become ninja, Kurama well keeps his human brother safe from the villagers.