idea for naruto / rosario + vampire / devil may cry / highschool dxd crossover title: sucsessor of the dark knight Summary: during the 4th great ninja war, naruto discovers his full heritage as a pure-blooded devil of the house of gremory and the house of sparda.
however he is the only member of the house of sparda left. armed with this knowledge and together with his wives leaves his home through a dimensional portal to the world of dxd. they appear in the middle of kyoto. from there they, as well as six others, start school at a place call Kuoh Academy. how will things change when the decendant of minato sparda and kushina gremory makes his presence known? naruto x harem. mass harem. rinnesharingan naruto.
juubi jinchuriki naruto. god-like naruto. dxd and rosario + vampire are part of the same world. slight issei bashing. all of naruto's e.p. are mutation pieces.

harem naruto's world: hinata hyuuga (obviously), ino yamanaka, kurotsuchi, anko mitarashi, shizuka of nadeshiko, fu of taki, tenten, karen.
harem dxd world: rias gremory, akeno himejima, serafall leviathan, kuroka, xenovia, irina shidou, sona sitri, yasaka, gabriel. (i'll leave deciding if koneko will join to you people, but asia will be like a sister to naruto.)
harem rosario: moka akashiya (both personalities), kokoa shuzen, kurumu kurono, mizore shirayuki, ruby toujo, yukari sendo (older), and shizuka nekonome.

naruto's peerage king: naruto uzumaki namikaze sparda (devil - jinchuriki)
queen: kuroka (nekoshou)
rook 01: moka akashiya (shinso vampire)
rook 02: kokoa shuzen (vampire)
bishop 01: ruby toujo (witch)
bishop 02: yukari sendo (witch)
knight 01: shizuka of nadeshiko (Kunoichi - human)
knight 02: tenten (Kunoichi - human) sacred gear: blade blacksmith pawn 01: kurotsuchi (Kunoichi - human)
pawn 02: mizore shirayuki (yuki-onna)
pawn 03: fu of taki (kunoichi - human - ex jinchuriki)
pawn 04: hinata hyuuga (kunoichi - human)
pawn 05: anko mitarashi (kunoichi - human)
pawn 06: ino yamanaka (kunoichi - human)
pawn 07: kurumu kurono (Succubus)
pawn 08: karen (kunoichi - human)