The Darkness Returns

We've all read the fanfics of where naruto ends up in the DxD universe or he is born there however I have only found one that had Naruto as the darkness host, so I thought I'd try my hand at it and see what we can come up with :)

This fanfic will be Naruto x DxD x Rosario Vampire x Shinmai Maou no Testament will be included along with Fairy Tail magic elements.
Naruto x Mass Harem!

Naruto's harem

Rias Gremory
Akeno Himejima
Koneko Toujou
Xenovia Quarta
Rossweisse
Kuroka
Irina Shidou
Ravel Phenex
Mio Naruse
Maria Naruse
Yuki Nonaka
Zest
Chisato Hasegawa
Moka Akashiya
Kurumu Kurono
Mizore Shirayuki
Kokoa Shuzen

Issei's harem

Asia Argento
Le Fay Pendragon
Serafall Leviathan
Yasaka
Kahlua Shuzen
Ruby Tōjō
Kurumi Nonaka
Lucia

Tsukune Aono x Akua Shuzen

Basara Toujou x Gabriel

Yuuto Kiba x Tsubaki Shinra

Gasper Vladi x Yukari Sendo