When Naruto was born he was ripped away from Kushina when she tried to use a jutsu to go to a different world where she could raise Naruto without the fear of him being used as a weapon for the leaf or being killed by rock for the grudge against his father. As she start the hand seals for the technique a root anbu interfered and Naruto was flung into the portal going to the world of bloodborne. When Naruto is there he is raised by the hunter in the story of bloodborne and is taught how to use the various weapons that are in bloodborne. When Naruto and the hunter defeat the last boss in bloodborne and end the never ending nightmare Kami comes to bring him home. She lets him leave with all the weapons he has and makes his guns run off of chakra.
Requirements:
Naruto must have Threaded cane and Blade of Mercy
Kami gives Naruto a summoning contract for the beasts in Bloodborne
Civilian and Sasuke bashing
Naruto X Fuu or Yugito or both
Strong Naruto and friendly brother like kyuubi
Motherly/Fatherly Hunter (Depends on the gender chosen for the Hunter)
Naruto is 18 while the rookie 12 are the same in canon.
Doesn't have to follow canon but should have wave arc and chunin exam arc.