This is basically set in the DxD universe with Sigurd's Descendant's adventure in DxD universe (its a reboot of Dragon Slayer in a World of Devils and Prince of Shadows). And this maybe a Sona x OC story. And it may not be as accurate to the main st...
Gram and Riser are currently being treated for their wounds and bruises
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(They both look like that but remove the jacket)
Gram: And then I punched him in the gut.
Riser: Seriously? He coudnt even hurt another human?
Gram: Yeah, I expected him to at least make me feel his punch.
Riser: I guess all his training went to nothing.
Gram: Oh do tell?
Riser: The pervert managed to land a punch in my face but I couldn't even feel it.
Gram: Dang. I guess their training really did go to waste.
Suddenly Grayfia entered the room
Grayfia: Pardon my intrusion. But The 4 Satan's would like to speak with The human, in Private.
Gram looked at the Nurse bandaging his bruises and wounds
Nurse: Just finishing this up.
After the nurse finished bandaging his arm, Gram left the building with Grayfia.
Gryafia then created a portal which teleported her and Gram somewhere else
Grayfia: Welcome to the Gremory Estate.
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(The Mansion)
Gram looked at the mansion with a meh face
Grayfia: Not interested in mansions?
Gram: I lived in a castle for a few years, so not really.
Grayfia: I see. Anyway, let's go in. The 4 Devil Kings are waiting for you.
Grayfia and Gram went inside the mansion
The two of them walked pass the living room and Gram sees that Rias and Sona with their respected peerage, talking with 4 adults and a boy with red head.
