For this request, I want the universes of Bleach and Highschool DxD to collide. Not in the sense of it being a crossover, though it is one, but in the sense of the universes colliding more literally. Right after TYBW, the death of the soul king, and then Yhwach, destabilizes something in the Bleach universe. As it turns out, the first quincies, alongside Yhwach himself and the soul king, came from the DxD universe originally. The soul king was Hades strongest reaper/shinigami or whatever they call it there, however eventually his power outgrew Hades and he was banished for being too powerful. Yhwach is still, of course, the soul king's son, but for some reason he was born with unique powers of his own that he could share with his followers. The universes started to collide when the soul king died, but completely became one once Yhwach died. The various dimensions/pantheons of DxD all become their own dimensions in the world of Bleach, and the hell of the Bleach universe combines with the underworld of DxD, causing mass confusion among devils. Soul society combines with the Shinto faction of DxD, as in Amaterasu and the like, and mass confusion ensues there as well for both parties. They do not merge with heaven, as I believe they are more closely related to the Shinto faction in general. Huceo mundo remains untouched, and does not change. While soul society gets acquainted with the Shinto faction of DxD, Ichigo does what he can to help in the aftermath of the war with Yhwach, and then leaves to attend Kuoh academy, a random school he chose after realizing he still needs to complete his schooling. Before he leaves, however, he becomes acquainted with the various factions of DxD courtesy of Amaterasu. Amaterasu is slightly rude to Ichigo at their first meeting, seeing him as a simple human and wondering why he's there with the rest of soul society. She is promptly corrected by everyone, and apologizes by teaching him about the various factions personally. The rest of soul society has the factions explained to them as well, and they have to take classes from the rest of the Shinto faction's leaders to understand everything about the new universe they find themselves in. The central 46 should not be a problem in this fan fiction; Yamamoto believes that if they were to hold any authority, soul society would end up initiating wars against the various factions they'd be on the losing side for. Ichigo will be have all three of his most important powers: shinigami, hollow, and quincy, as well as true Bankai. I want him to actually train his quincy abilities during the course of the story, but I do not want him to become a devil. I want him to be close friends with Amaterasu, and call on her and soul society when he's in need of help. As for power scaling, take this for reference: the soul king after leaving Hades employment went on to become incredibly strong, because he was also very intelligent. At his height of power, the soul king was on par with The heavenly dragons of DxD. Now, in this story, I want Ichigo to be far stronger than the soul king in his prime. Sorry if you disagree with this, but it's "overpowered requests" for a reason. Anyway, due to this, Ichigo is on par with Great Red and Osphis. Add his quincy abilities to the mix, and he'll eventually become even stronger than both of them. I want Kisuke to help Amaterasu in forming more alliances with other pantheons like the devils, and I want him to become the personal advisor for her as well. Yamamoto and rest of soul society become a sub faction of the Shinto pantheon, under Amaterasu's rule. Some shinigami don't like this, so it causes a minor civil war in soul society. This is quickly resolved, however, and Yamamoto and the captains become a special division of Amaterasu's guard. As for the rest of the story, you can do whatever you'd like.