Jojo's Bizarre adventure: Out of the blue (jojo x DxD x TOTNSD)

Taking place after DIU and GW (which happened at the same time in this universe). Jorge Joestar/Tarou Higashikata, aged 15 and the elder twin of Josuke Higashikata recently came back from Italy alongside his GrandUncle, Giorno Giovanna. Tasked with Protecting him from some malicious forces who have recently targeted him for possessing one of the stand arrows. Other stand users, Devils, fallen angels, angels, Gods and even heroes want him dead for possessing one of those so-called 'Requiem stands'.
With tension rising between the factions and Morioh town been targeted for elimination, they move to Kuoh to keep the place untouched by the supernatural once again. But all of it comes crumbling down when bizarre situations start to occur.

I do NOT own any of the stories or character (except for the Oc) in this book, they go to their respective authors.