DxD Mash-Up: Soul System

Ichijou Ryu, eldest son of the Shuei Clan Yakuza and older brother of Ichijou Raku, finds himself with memories of a past life and within those memories, he is able to understand that he reincarnated into DxD with a Soul System which gives him a unique way to power up in the danger-filled world. Finding himself in a mash-up of immense proportion, he will need to get it together as the balance of each power keeps tipping. What challenges await him? How strong are the threats? Will he be able to cope with the sheer inconvenience of spontaneously transporting/reincarnating/transmigrating into different worlds to answer a soul call? How strong will he become? How long will the chapters be for that world before going back to his main?
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The MC may be a reincarnated soul, but because I wanted him to fully integrate himself into that world, he retains the personality he cultivated in the world. I'm not some 4D chess kinda dude, so the antagonists and all those cunning people in said animes will maybe fall short so I'll try my best.
He will obviously have bullshit luck and stuff.
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Alright, so critique is welcome. Please Comment as well.
I'll do my best to upload.

If you wanna join my discord, here it is:
https://discord.gg/XDDMQ4fp
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This is a Fanfiction.
I do not claim ownership or credit of any of the works here or their characters, only My OCs, so go support the authors of those light novels/manga.