Prologue: The Seal


Here's the Prologue of The Protector of Remnant now renamed to Sealed Under a Broken Moon!


Trihexa is a legendary being known as the Apocalyptic Beast and Emperor Beast of Apocalypse. The beast has the appearance of a large beast with characteristics coming from different animals like a lion, a leopard, a bear, a bear, a dragon, and other beasts. It has seven necks, seven heads, with ten horns, as well as seven long thick tails of different shapes. It also has four stout arms and two legs that are even thicker than its arms.

Its main body is that of a primate leaning forward and is covered in black fur and what appears to be scales all over its body. Its size is well over several hundred meters, making it significantly bigger than even Great Red.

At its full power, it is stated to be on par with Great Red and Ophis. In the past, the God of the bible almost used all of his power to seal it away at the "end of the world".

That was until Rizevim Livan Lucifer and his group the Qlippoth managed to find where it was sealed using the sacred gear Sephiroth Graal's ability to come into contact with the principle of life and decided to unseal him with the power of the holy relics.

The DxD anti terrorist group attempted to stop Rizevim from unsealing but they failed. After Issei Hyoudou managed to defeat Rizevim with his new for the Dragon Deification or otherwise known as the Infinity Dragon Drive, Rizevim made a futile last attempt with merging himself with the Beast of the Apocalypse and that was the start of the end of the world.

For seven days the Beast was wreaking havoc across the world in the supernatural and in the human world. That was when the leaders of the supernatural world came to a conclusion that the only solution now was to seal themselves with the beast in another dimension.


"Sirzechs-sama? What is happening?"

My body was unable to move, but I still asked Sirzechs-sama.

"This is it. This is the final means of those of us in the top brass. According to our calculations, defeating Trihexa will require an enormous amount of time. Of course, being able to completely seal it would be best, but…it is unfortunate that that will also take a lot of time and is not the conclusion that we need."

Sirzechs-sama's peerage applied techniques to the core, and flew towards the hole in the sky together. Sirzechs-sama continued

"Regardless of whether we defeat it or seal it, either method is extremely time-consuming. And Trihexa will continue its destruction in the meantime. If that continues, the world will be completely destroyed. Our combat strength is also limited. Once, or twice, we may be able to hold it back, but there will come a day when our strength is exhausted. Just like before, you saw what kind of a monster the opponent is, Ise-kun. It is a true monster that will completely regenerate no matter how you try to defeat it."

Sirzechs-sama began to move away from where I was. While flying upwards, he continued to say

"Serafall, Falbium and I, as well as my peerage will depart from here to the 'Isolation Barrier Field' that was created by Azazel and the others specifically for use against Trihexa. We will also seal the original body and the core within that field. And be confined together with it. The higher ups of the other factions have also agreed to this plan. Azazel, Michael-dono, Odin-sama, Zeus-sama, and other gods will also implement this plan in their respective territories at the same time."

What! Their unbelievable plan left my head in a daze. The large operation that sensei spoke of earlier was actually to seal the higher ups of each faction together with Trihexa in an isolated field! Sirzechs-sama said

"Until we defeat Trihexa, we will continue to fight there. I don't know how many years it will take, but while we are fighting there, peace will come to the various factions of the world. This is…necessary. This is something even more important for those of us who are in the top brass. Like this, I can finally fulfill my duty as a Maou."

Sirzechs-sama looked into the distance.

"Just now, I've received some new information. The true successor of Lucifer has appeared, and it makes me feel a bit happier. Vali Lucifer, he is the true heir and successor of Lucifer. To Devils, Lucifer is a necessary existence. Hakuryuukou Vali, he is different from Rizevim."

Sirzechs-sama gradually moved further and further away from me and Grayfia-san.

"But, from now on, other Maous will be needed. Ise-kun. I don't think there will be any problems if you become a Maou."

I wanted to say something, but I no longer had the strength to even speak, and my consciousness gradually receded. Even so, Sirzechs-sama still conveyed his words, his emotions, and his will to me.

"If it's you, then you'll definitely be able to become a great Maou. Although there are currently a lot of deficiencies…but in the near future, surely, Ise-kun, you will become the hope of every faction."

Sirzechs-sama's voice gradually became more distant.

"Rias, Millicas, and Grayfia. I leave them in your care for some time. Don't judge Grayfia by her appearances, she'll actually be very lonely, even more so than Rias. …When I'm not around, I hope that you can be her conversation partner."

You're too cunning, Sirzechs-sama. I still have so many things to tell you, and also many things that I would like you to tell me, and also many, many things that I want to do together with you. Sirzechs-sama's final words reached my ears

"Ise-kun, the Underworld will be left in the care of Rias, Sona, Sairaorg, and the others. Next is Millicas' generation, and the generations which follow, so please look after them on my behalf. Well, goodbye."

At this point, I lost consciousness.


A blinding light covered Sirzechs and his peerage members as the Trihexa was now being pulled into the hole of the isolation chamber until a magic circle appeared on his side telling him something is going on.

"Sirzechs, something is wrong" Azazel told him from the other side of the magic circle.

"The isolation field is not pulling us in with Trihexa!"

This made Sirzechs confused as they made the seal so that the top brass will be sealed with Trihexa in the Isolation field but right at this crucial moment where the whole world depends on it, it was now working.

"What do you mean we are not being sealed with it?!" Sirzechs ask in confusion.

"Someone else is being sealed with Trihexa in the Isolation field!"

A large bright light suddenly burst out from the seal on where Trihexa was being pulled in, blinding everyone in the process.


The lights finally died down and Sirzechs finally regained his vision. He looked over the place trying to figure out what was going on.

He recognised this room as it was the room on which he left Issei and Grayfia. Fearing that the beast was still out there he tried to locate it but surprisingly he did not feel its presence at all, not even a trace of it.

"Azazel what just happened? And where is Trihexa?!" Sirzechs asked Azazel in his magic circle but didn't get a response.

"Azazel!" Sirzechs asked once again finally getting an answer from Azazel

"It's gone," Azazel replied.

"What do you mean it's gone!?"

"What I mean is that Trihexa is gone leaving no trace behind it! It's almost as if it never existed!"

"Then what happened to the isolation field we saw Trihexa being dragged in?"

"Someone else must have interfered with the seal."

"How about the other Gods are they still here?"

"Yes it seems the other Gods who were planning on sealing themselves in the isolation field are still here."

"Then who went in with it then?"

He looked over the room and he could see the rest of his peerage and even Grayfia too but one person was missing.

"Issei?"

He could not find Issei anywhere.

"Issei where are you?!" He tried calling out to him but there was no answer.

He tried to sense his life force, his evil pieces, and even his sacred gear he tried everything just to find wherever he was but still he could not find him.

He summoned a magic circle in his ear again to talk with azazel.

"Azazel."

"Yeah?!"

"Issei is gone."


I was finally regaining consciousness, opening my eyes. I expected to be in the hospital once again but was met with a white field with a swirling vortex beneath my feet.

The last thing that I remember before falling unconscious was that Sirzechs and the others were going to seal themselves away with Trihexa in the Isolation field.

I tried to figure out where I was but still could not recognize this place.

I tried to summon my boosted gear but it didn't work.

What happened to me?

Then I remembered that I used the diabolos dragon form again.

Did I die?

Then is this the after life? Did I really die after using that form again?

I tried to ask Ddraig again but was met with silence again.

Seeing that Ddraig no longer responds to me I slowly accepted my faith.

So I really died? I let tears flow out of my eyes as I remembered all of the things that had happened to me a few months ago.

I never had an interesting life until Raynare killed me at that park. Since then so many events have happened to me.

From fighting devils, fallen angels, the rating games that we fought together. The trips we went and more especially the people that i have met, the loved ones that i have made in these few months.

My parents, even though I was a pervert, I was still loved by my parents especially when I started bringing home girls in which they consider them as daughters as they always wanted daughters. But I wanted to see them again. They still accepted me as their son even after I turned to a dragon devil hybrid. I'm sorry mom, it seems I couldn't come for dinner tonight.

Kiba, Saji, Gasper, Sairaorg, Vali, and even brothers in arms, we all hang out with each other, help each other in missions, and we always protect each other's see ourselves as brothers all but blood.

Sirzechs, Azazel, Micheal, and Tannin, my mentors who helped him reach who he was today, all the training he endured from training with them. Azazel, who I considered as my second father. I will surely miss them.

But most importantly I remember the girls who I met and loved

"Asia…."I remembered when I first met her and the time that I saved her from the fallen angels, the times when she healed me every time I get injured,and the time when I thought I saved her from Diodora only to be teleported to the dimensional gap by shalba then I activated the juggernaut drive for the first time and going berserk defeating shalba only to be saved by the efforts of my team Vali's team.

"Irina…." She is my childhood when we met again we met as enemies as exorcists and demons. I remembered when we fought as I was grazed by her Excalibur in my abdomen which hurts like hell. The time when she became an angel as lord Michael's Ace, as she was stationed in Kuoh and started living with us. The time when we went to heaven and saved her dad from the poison when he was wounded by Masaomi Yaegaki.

"Xenovia….." When I first met I remembered when she threatened Asia accusing her of being a witch just because she healed a devil, as I challenged her to a duel for threatening Asia, but when she became a devil after learning about the death of god she, asia and Irina became the church trio who would always pray and hang out together, and I remembered the time where she wanted to have a child with me everytime she has nothing to do.

"Koneko…" the times I was called a pervert by my little adorable kouhai, the time I got punched by her for being lecherous, the time I saved her from her sister, and helped her accept her nekomata heritage.

"Kuroka…" The first time I meet her she tried to take koneko away but I stopped her by unlocking my balance breaker, when I learned the reason why she killed her master because they tried to experiment on koneko after experimenting with her, the time when I reconcile the two sister together, and the time when she helped with trouble with koneko when it was her mating season.

"Ravel…" my precious little manager. I still can't imagine that the same tsundere you were before will become my cute adorable manager. The rivalry between you and Koneko. And the amount of times you have saved me from death by giving me pheonix tears.

"Akeno…." I remembered the times whenever she teases me, and the time I helped her reconcile with her father and accept her fallen angel side. The times when she taught me how to cook. She was the best at cooking but nothing beats my mothers cooking.

"Rossweisse…." when we meet her as Odin's personal bodyguard, as she became a rook for Rias when she was abandoned by Odin, the time when I pretended to be his boyfriend during the visit of her grandmother, when I rescued Rossweisse from Euclid.

And finally.

"Rias…." my beloved Rias the time when she gave me a second chance in life, the times when we trained with each other, the time when they lost the rating game against riser, when I crashed the engagement party and defeated Riser and saved Rias as I receive my first kiss from her, and when I finally confessed my feelings for her after the match between our team and Sairaorg. Even when I was promoted into a high class devil I still stayed by her side.

I wanted to marry them all. I wish I could see them all again.

Tears continuously flow out of my eyes as the thought of never seeing them again flows to my mind.

"Dammit I want to see them all again!"

"Why did it have to be this way!"

"I JUST WANTED TO LIVE WITH THEM GOD DAMMIT!"

"AND NOW I'M ALL ALONE!"

That was when the vortex below started to pull me.

"What the hell is happening now!"

It continued to pull me into the center first taking my right leg then my left leg too and then my body.

"Dammit!"

At that point the vortex has fully pulled me in.


Issei begins to open his eyes. He could see the dark night sky once again, rising up he could see that he was in front of a huge building which is comparable to a huge castle. He noticed that the wounds that he had endured were gone and he was fully healed. But the most eye-catching thing he noticed was the shattered moon in the sky.

The first thought that came through his mind was to see where he was until he could hear a dragon crying in his head. Issei thought that Ddraig was back and decided to call out to him.

[huhuhu I missed you already partner!] cried the dragon.

"Ddraig?" asked Issei

[And now I'm hearing his voice!]

"Ddraig it's me."

[I'm hearing it again!] as he continued his cries.

"Ddraig I'm alive!" shouted Issei when the dragon finally noticed that his partner was alive.

[WAIT! PARTNER YOU'RE ALIVE!] he shouted in shock as he could see that his partner was alive and well.

"Yes Ddraig I am alive," reassured Issei.

[Thank goodness you're alive!] shouted the dragon in joy.

"Wait, you thought I'm dead!?" Issei asked as he heard Ddraig crying over his death earlier.

[I lost all my connections to you earlier partner and it seems like you were dead because I couldn't sense you anywhere. But the good thing now is that you're here alive!]

"Yes Ddraig but now we must know where we are?" asked Issei in confusion since he can't seem to recognize this place

[I don't know my partner, but judging from that moon I think we are not in our world anymore,] this startled Issei since he discovered that they are not in their world anymore when suddenly an unknown person called out to him.

"I think I can answer that for you young man," answered the mysterious person, the person seems to be a middle-aged man with tousled silver hair and thin brown eyes. wears shaded glass spectacles and a small, purple, cross-shaped pin on the cowl around his neck. His outfit mainly consists of an unzipped black suit over a dark green, buttoned vest and green shirt. He also wears black trouser shoes and long, dark-green pants. In addition to his cane.

"Who are you, and where am I?" asked Issei as he rose up and prepared to guard himself.

"Well young man my name is Professor Ozpin, and welcome to Beacon Academy."


A/N

Hello and welcome to my first fanfic. This story will revolve around issei exploring, protecting this new world, and gaining new friends and foes. I wanted to write this fanfic because there were a lot of fanfics where issei got transported to Remnant but those fanfic either got discontinued or the authors were not interested in it anymore, so from today on forward I will be the one who will complete a RWBY X High school DXD crossover.

Issei will not use the boosted gear for a while, because it would be too much for Salem to handle. Instead he will use a dual gauntlet which is identical to the boosted gear but it will not have its powers, instead it will have gun barrels in between its knuckles which launches dust bullets or normal bullets, and another barrel on its elbow to "boost" its punching speed.

The things that are changed in this story is that I have made Issei a high class devil but didn't make his peerage yet but he has his evil pieces.

Issei here knows the past between Koneko and Kuroka.

Akeno has taught Issei how to cook.

Anyway, please enjoy.

This is GUNSLYR signing off with a Yang!