Tokyo Has Fallen : A DxD Story

After bleeding and dying for the Factions and killing the Imperial Beast of Apocalypse, Trihexa, Issei is discarded by the Factions, deeming him useless, only the Angel, Shinto, Hindu and Norse Factions stuck by him.

Eventually, he was found by Secret Service Agent Mike Banning and then Vice President Benjamin Asher to which the former adopted him and became his son, renaming him Issac Banning. Issac went through the same training Mike did, though he took a different route from his father in becoming a Secret Service Agent.

One day on a State visit to Tokyo, the Khaos Brigade re-emerged from the shadows and attacked the Capital of Japan, taking the Emperor, Prime Minister and President of the United States hostage

The Brigade then reveals the Supernatural World and calls out the Alliance and Hyoudou Family excluding the Hindu, Shinto, Angel and Norse Factions for abandoning Issei when he was the reason the world is still standing which drew the ire of the rest of the world.

Now it is up to the Former Pillar of the Factions to save the day once again, rescuing the Three Leaders and Taking down the Brigade once again. How will the Factions react to this revelation? Would they regret throwing Issei away so easily?