Naruto the illusionary fist

The third Hokage after finding out Naruto was kicked out of the orphanage at four years old decided to take a more hands-on approach figuring out how things would go down in the later years tasks Kosuke eternal Genin and to be his minder and trainer selling the council that he needs someone to look after him so he does not get into trouble placating the council that eternal Genin and cannot be that great of a teacher

Little do they know that seeing Naruto's situation and more most likely would happen to him reignites the will of fire back in Kosuke he proceeds to teach and drill Naruto in the basics of a shinobi to an insane degree(Naruto will alter the clone technique so you cannot see where his attacks coming from making his arms and legs look like they're coming from multiple directions no hand signs substitutions and perfect transformation) with a highly developed taijitsu and perfect chakra control The Shinobi world will be turned on its head by the illusionary fist

[A alternative is you have a complete oc be the main character his background more being that of a civilian who does not have the Privileges of having a Shinobi family catches the eye of kousuke]