Four years before Rias Gremory met Hyoudou Issei——.

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That 〈Blade〉 of the abyss met a black-winged man and a white dragon boy——.

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Hey black dog, are you human, or else——.

Your 〈Blade〉 is a prohibited means of cutting even God——.

The further you sink to obtain strength, the more human you are——.

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We have to shake off our pursuers in order to survive. Even if it’s a close friend——. –One of the students who survived: Minagawa Natsume

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It was said they possessed the ‘Independent Avatar’-type prototypes.

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Hello, Tobio. I’m Suzaku. Himejima Suzaku. Your——relative. –Next head of the Five Principal Clans’ Himejima Family: Himejima Suzaku

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The ‘blood’ that dwells within his body draws him into a strange and supernatural world against him will.

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Heh, your is a dog huh. This is a cat. For me it’s a spear that pierces everything. –One of the students who survived: Samejima Kouki

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However, Ikuse Tobio’s dog grows a demonic blade that has excessively unusual power.

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I am only here on behalf of Suzaku. To be honest, it is preferable not to be involved with thee. Thou——the blade of everlasting darkness. –Next head of the Five Principal Clans’ Kashihashi Family: Kashihashi Seiryuu

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The ones Tobio and the other meet——is a group of families with supernatural powers who have protected this country from the shadows.

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It seems we are closely linked. My family and the black winged group that is. –Executive of the ‘Utsusemi Agency’: Himejima Hanezu

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However, those five families carry darkness.

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Since I’ve been dispatched to the Far East, whether fallen angels or witches I take them all on at once! –Young agent from the Vatican: Freed Zelzen

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This series of events have completely changed his destiny, perhaps more than he thinks.

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……Likewise, since there’s no fighting, I’ve weakened……!!! It’s because of him, the Governor-General!!! –Leader of the Grigori: Kokobial

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That man’s grief has actually changed him——.

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KAKAKA!!! How interesting!! That these two monsters would be born from the Five Principal Clans at the same time!! It’s unbearably amusing!! –Next head of the Five Principal Clans’ Shinra Family: Shinra Byakko

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……Uuh, how scary how scary. Gathering the ‘Incarnations that destroy even God’ in such a manner……! –Next head of the Five Principal Clans’ Doumon Family: Doumon Genbu

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Unusual power summons unusual power, the mysterious summons the mysterious.

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Everyone, everyone, you should all sprout flames! –One of the witches: Walburga

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Malice, fresh malice has awakened——.

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If that is truly inside all of you, I want to fight it by any means. –The silver-haired boy possessing a Heavenly Dragon: Vali Lucifer

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He’s yet to see his lifetime rival. However, until that time playing with the dog of ‘Black’ isn’t so bad——.

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I see, those kids are……. Fine then, I’ll take responsibility. –Leader of the Grigori: Baraqiel

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That encounter was linked by a strange destiny——.

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Surely, this is destiny. Since similar things dwell within both me and you. –The young girl who uses magic: Ice Princess Levinia Reeni

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That girl was also born with something mighty residing within her——.

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No matter what kind of person you are, no matter what you become, since for me Tobio is……. –Female childhood friend: Toujou Sae

If he touches that dark blade, if he uses it, that important boy will be swallowed by darkness.

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You possess that dog.

You understand?

That ‘Dog’s’ black blade——it’s something beyond humanity.

……However, if you become our ‘Blade’, we can kill them together.

Those people——.

–The black-winged man: The Governor-General of the Grigori: Azazel

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The conflict that occurred four years before Hyoudou Issei met Rias Gremory——.

Different from the red dragon of just rule and the white dragon of military rule, this is the tale how the black dog came to walk the path of conflict——.

The entire truth has been revealed——.

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If it’s the power to save everyone, the power to resolve everything, then I will fight.

Even if it’s this blade that can destroy even God.

Come, let’s go ‘Jin’.

–Master of the black dog ‘Jin’: Ikuse Tobio