Every Highschool DxD content belongs to Author Ichiei Ishibumi and Illustrator, Miyama-Zero.
"Ddraig, do you think she's still alive?"
[...]
"Answer me, Ddraig."
[Who do you mean by 'she', partner?]
"..."
"..."
"Are you serious, Ddraig?"
[Hmmm...?]
"You know exactly who am I talking about, Ddraig."
[Huh?]
"She is supposed to be beside me all the time, Ddraig."
[Eh!?]
"Now, do you remember, Ddraig?"
[Is that you, Issei?]
"Yeah, it's me, Ddraig. Who else it would be?"
[No, not you, not before this very moment.]
"If you're talking about the other one, he's gone, Ddraig."
[Is that true, partner?]
"Yeah, his time was up."
[Why now? After a few decades?]
"Decades?"
[Yeah, partner. He's not that long in this, but you're not here for a few decades, or even centuries.]
"Hmmm, was it that long?"
[Well, for human it is long. But for us it's not that long.]
"I see."
[Partner?]
"Oh, yeah, do you have the answer, Ddraig?"
[I'm sorry partner.]
"...I see, so you don't know either."
[...]
"Heh, so optimistic of me to think of that possibility."
[Partner.]
"It's okay Ddraig, it can't be helped, it's been a while any way."
[Partner!]
"I have no choice but to keep moving forward."
[Partner!]
"Huh!? What's wrong, Ddraig?"
[I don't know where she is.]
"..."
[But I know that she's alive]
"!?"
[So yeah, that possiblity hasn't gone, yet.]
"Thanks, Ddraig."
[Partner?]
"That's good enough, I still can do this, and I'll say again... Thanks."
[Sorry, partner, that's all that I know.]
"That's okay, and Ddraig..."
[Hmmm?]
"How long has it been?"
[I never really keep tracking time, so...]
"I see... but, we'll find out sooner or later."
[Yes, we will.]
"Ddraig, once again, will you go with me?"
[Of course, partner. To the end of the world.]
"That's what I like to hear."
After the conversation between the two, the smiling brown haired young man stood up to face the fading crescent moonlight, covering the night with darkness.