Hello this is an idea for a story for someone to write because I can not but the basic idea is that naruto is the son of asuma and an oc but the woman dosnt matter as she is dead when the story begins but she is the daughter of madara and an oc uzumaki who he saves and falls in love with but she dies and he leaves the daughter in the capital where she ends up working in the daimyo's palace where her and asuma fall in love and have baby naruto but the mother dies when the rebellion happens and asuma sends naruto to be raised by the 3rd homage who trains naruto who becomes his apprentice and signs the monkey contract and this one of his main weapons along with sharinngan and various ninjutsu like the 3rd hokage .
He would also have red hair as part of his uzumaki heritage and another thing to add for when he is battling big enemies like manda and the bujji he can have the wolf contract and have sif the wolf from darksouls as his personal summon from the wolf contract you can even make it so he don't have the wolf contract but make it so sif was a normal wolf but with the help of a jitsu grows big along with his sword
I would like him learn sage mode from the monkeys and make so they didn't think hiruzen was the rite one to master it or something along those lines
And for people asking how the 3rd train him a kage Bushin will do most of it when he's busy and after the academy you can make asuma be his sensei I guess with shika and ino like in better left unsaid.
For pairings I don't mind but female haku would be nice but that's up to you but no yaoi ( or whatever the homosexual parring is called and not that I'm against the lgbt community but its just not my thing to read)
All in all a lot of creative freedom to do what you want.
If you have any other questions just ask.