The Mistake of Rias

[Before starting, you must remember that this is a fanfic/theory, the characters, images, music used, credits to their creators, the story, their order and personalities will be changed]

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"How did this happen?"

Well they say that nobody knows what they have until they lose it, but I just wanted to give the best to the person I loved, but after all, I said it myself, demons are greedy and lustful in what they want, and this time my lust won over the love one once gave me.

At this moment my heart just wants to feel his warmth again, apologize for everything, to go back to the beginning, to see him smile again, to tell me again that it was the most important thing to him, that this never happened, but that is no longer possible, now all I see is a genocide, one of the noblest people and who protected the ones he loved with his own life, one of the most ruthless returned, I promise that if we are reborn again, this time I will not disappoint you, I will do that only you and I be happy, give you everything you always deserved, but for that to happen. I'm going to stop you right now. Although it hurts in my heart.

"ISSEI I'M GOING TO KILL YOU"

--Pov flashback of Rias--

It's been a while since the supernatural fought a big battle, and thanks to that several factions joined the alliance, and a team was also formed to fight the problems, these were the ones that made up the DxD team.

Among them was Issei, I was happy for him, and I wasn't the only one, we were all happy because of how strong he had become.

However, the problems did not wait, and the DxD team acted as they had to.

This worried us but we knew how strong Issei was, so we were a bit relieved.

But while he turned his attention to them, we felt a little abandoned.

That does not mean that we were left aside, whenever he could he sent letters, flowers, and we talked through a magic circle, but it was not the same as having him face to face.

We take this opportunity to talk about Issei and how he did so many things for us.

We all come to a conclusion, he has already done a lot for us, it's time to do something for him.

With that idea in mind, we asked people who knew more about the subject of love, since we were still inexperienced in this subject.

All of them gave us their opinion, that we should take his tastes into account and make him feel calm being by our side.

We all knew that Issei likes oppais the most, and he had great lust.

But if we're honest, we didn't know beyond him.

So we decided to find out more about him.

We started with his parents, but they were traveling so we barely got to talk.

We went with his friends from the perverted trio and it was easy to get information from them, although their lewd looks were a bit uncomfortable, after all Issei was the only one who could see us like this.

Or so we thought, the place where it was easier to get information was the place that would start everything.

In the distance there was a boy, strangely he reminded us of Issei, he was a little taller, he looked more rebellious and his eyes were of a different color, apart from that, there was almost no difference, it was like seeing Issei but more, mature? ?.

The boy looked at us neutrally, he approached us saying that if the two perverts were bothering us, he surely wanted to be a flirt.

We replied that there was no problem, he introduced himself under the name of Kota.

I repeat, strangely, we liked him, he reminded us of Issei.

From that day we met often, the girls at the beginning were great to establish a relationship with him, but it wasn't until he told us about his past.

He had a girlfriend but unfortunately they had to separate because she went to live far from the country. .

I felt empathy for him, but an idea occurred to me, he knew about relationships and love stuff, so he could teach me about it, right?

I told the girls about it, they seemed doubtful but I told them that it was to please and make me feel happy, they agreed, but they were still doubtful.

The days went by, then weeks, until the months passed, little by little we became friends with him.

Despite the fact that Issei talked to us whenever he could, we no longer felt so sad that he was not with us, perhaps because we thought that what we did was for when he returned he would feel happy, or perhaps because Kota reminded us of him. .

In just a month he had gained our trust, and as a devil I was drawn to power and he had great magical aptitude, I know because I could feel it once he got angry and released some magical power.

I decided to tell him about the supernatural and about what we were demons, he seemed only a little surprised but he accepted it quickly, I couldn't join my entourage but that didn't mean that we couldn't help him.

The girls also agreed to help him, and little by little without realizing it he was more and more provocative, he treated us as if we were special to him, it was like feeling Issei's concern but without the enormous lust that he gave off, he still had his perverted side.

He showed great progress on his magic so we decided to celebrate it at the club, the girls after the party left each other.

I stayed with him, accommodating the place a bit, but he began to be more daring little by little, I laughed at his gallant attitude, but I decided to play along.

Maybe it was the environment or the things that thanks to him I learned a little about love, or it was just feeling the warmth that I missed from Issei, but he kept getting closer to me, I should have gone back and hit him and made it clear that I already had Issei.

But it was strange right now my mind wasn't thinking about Issei, it just focused on the boy in front of me.

He hugged me from the waist, by inertia my arms surrounded his neck, he whispered my name with a thick voice and I mentioned his.

Our lips got closer and something happened that I thought I would only do with Issei, we kissed.

My mind was lost but my heart ached, I wanted to stop it but he started to move his hands down my back, and a feeling of heat and excitement surged.

The feeling in my heart was overshadowed by the lust that I began to feel at this moment.

She no longer thought about Issei, she just wanted to feel the young man she was now kissing.

I gave myself to him, I gave him what only Issei wanted him to have, however there was no turning back.

That night was no longer Issei's now it was Kota's.

The days passed after that, Issei was leaving my mind, and now there was only Kota, the lust that he provoked in me was enough to make me submissive to him, and fulfill his whims.

To the point of dragging my friends into this.

That they too were falling before him until lust caught them.

One of those days I went to the Underworld at the request of my mother.

She asked me if I already had a way to please Issei, at that moment I remembered it, my heart remembered it, but it was appeased by the image of Kota.

I went to my brother, to ask about his whereabouts.

Upon arrival I saw my brother with Grayfia onesama, but leaving that aside, I asked him about Issei.

He replied that he had chosen to solve the problems first.

I didn't let him finish and with visible anger I yelled at him that how dared he choose to fight before us, after that I left the room.

I didn't know at the time that he was doing it for us.

I told Kota and the others and they got mad just like me but we didn't really care anymore.

We told Kota about Issei, he got a little upset about Issei and us not telling him anything.

But he came up with a plan, more like me, at first they didn't agree, even though we thought to tell Issei that we're done with him, it wasn't so much to do that to him.

But Kota convinced us, no, rather, he brainwashed us with that lust he used.

That was what he told me, but I knew that it was me who was the most active in it.

And so we spent the following weeks planning Issei's downfall, the betrayal that I now regret.

When he returned, seeing him was like seeing any acquaintance.

He invited us for Christmas, we knew it from the letter we found in our room, we planned to go to make things clear once and for all.

But we prefer to spend the night with Kota enjoying our pleasures.

A week was when Issei would finally leave our lives.

The trial took place and when the attack hit him and we thought he died, a pang attacked our heart.

But we go on with our life.

--End pov flashback of rias--

Now he is standing in front of everyone, in the middle of all the destruction, what was once known as the floating city Agares, is falling right behind him.

"Then come for me... Rias Gremory"