Flashback
The Day Before Barrier Break
Sitting in Yui's living room after school one day, both Kaori and Yui looked down at what they had gotten on their way home. " 'Your wish will be granted.' That's a weird thing for a flier to say." Kaori said as she looked at the one in her hands. "What do you think."
"I agree that its weird for a flier to say something like that, but I say we try it, and if nothing happens, we could always ask someone from the old ORC club," Yui said thinking about it for a moment and decided to try it out. "If we only use one of them now and something happens to it, we'll have another just in case." She finished, getting a thoughtful nod but as they were trying to figure out how to activate the flier, the one in Yui's hand activated and flew out of her hand getting a surprised gasp out of both of them, both at that it worked and at who popped out of the flier.
As Asia was teleporting into a new summons that had just come in, she wondered what to expect out of the new contractor. What she didn't expect to see when she could see again was two of her old High School classmates having fallen back in shock at the fact that the flier had worked as well as who had popped out of it. "Well, this is awkward I'm sure but I'm sure I can answer any questions the two of you have." She started awkwardly herself as she hadn't had a situation like this before, but knew that it always would be a possibility considering everything that goes on in Kuoh.
Once the two girls had calmed down some, the three sat down and started talking about what had just happened. "So let me make sure I understand correctly. For the past three years, most of the members of the old Occult Research club, as well as the Student Council during High School, had Devils in it and two of them were pretty much princesses for their families. Am I missing anything?" Yui asked stunned after hearing what all had been told to the two of them so far.
"There's a lot more that I could cover I'm sure but that's the basics out of the way yes."
Kaori though couldn't help but ask something that had caught her attention. "By that logic, Issei would also be a Devil correct? Was he always one? That could explain some of his more perverted sides." She said, thinking about what little she knew from books and such but Asia only chuckled and shook her head showing that Kaori was wrong.
"One might think that, but no. He became a devil not long before I did. Even though his perverted tendencies cause some interesting times, he's still one of the kindest people I know that will do anything for those he cares for." She said thinking back to all the things he'd done for her, before diving into some of it for the girls. "While I was originally a part of Rias's group, I was willingly transferred to Issei's when he had the chance to make his own."
Both girls were stunned at what they had just heard. "Wow… just wow. I don't know what to think honestly after what you just told us." Yui stated, getting a nod from Kaori and Asia could agree with them that this would be a massive change in their opinion.
"I can promise you that he's a different person when he needs to be but he is still someone that I have come to love and trust with my life," Asia said before the group sat back and continued talking about the supernatural.
Flashback End
As the headache went away, Issei couldn't help but wonder how the two girls would react and also why their memories came back in the first place. He didn't know about them having gotten fliers in the future timeline and knew about it in the little time they had them before the Beast broke free since it had happened the day before the break-out and Asia hadn't mentioned it to him yet.
As he went up to them to see how they were doing they fell to their knees as the shock hit them. "OK. I'm sure you have many questions for me and I'll try my best to answer them but are you two ok?" Issei asked, knowing it might sound callous but he wasn't sure how to handle this situation.
As Kaori came back from the massive headache she knew something was off, heck she realized almost instantly that she was back to being a kid and at the park by her house. "Issei? What the hell just happened to us? Why are we back in time?!" She asked as her mind tried to catch up to what was going on with Yui being the same way, but not being able to talk as her system tried to catch up.
"I will explain everything to the best of my abilities but this isn't the best place to do it. I don't know if you two will trust me due to our past, but we can go to my house and talk privately about this. I promise that nothing bad will happen to you if you might think that due to our, well, past I guess may be the right word here, but I want to talk to the two of you in private."
Kaori wanted to protest his words on instinct due to their past, but she also knew that something had seriously gone either wrong or this might be a nightmare, but she also took into consideration what the two of them had learned from Asia, so decided to take him up on his offer and after sending a look to Yui, saw she seemed to have the same idea so they both nodded and the three of them made their way to his house.
Meanwhile
As Azazel was sitting at the park reading a book for once instead of his normal magazines when he felt a minuscule but massive wave of power wash over him from nearby and it was a form of magic he had never felt before and didn't recognize.
Stolen novel; please report.
Trying not to look too rushed as he looked up from his book, he was able to determine that it had come from 3 kids, two girls and a boy, that were just leaving the park. 'Interesting. I don't know what sort of power that was, but I know it's something that I need to keep an eye on.' He decided, knowing that if someone at the age of those kids from what he had to guess, he knew if it wasn't handled right it would end badly so he made a mental note to find out what information he could about them and go from there.
He also couldn't help but notice that he thought he could feel a Sacred Gear off the boy but it was very well hidden so he made sure to consider that as he made plans.
Scene Skip
As the three of them reached Issei's room, the two girls were surprised at how easily they were able to get in and not be questioned as all it took was Issei mentioning that it was something to do with the supernatural for them to leave the kids be. "Well, that went easier than I expected," Yui commented as she found a seat on the edge of his bed alongside Kaori while he took a seat at his desk after setting up a privacy barrier. "I didn't think that they would let us leave that easily."
"They know about the supernatural and that I'm a part of it so they might have figured it was something to do with it, or just decided to be nice for once." He commented distractedly as he finished setting up the barrier before he realized what he'd just said. "Well, I guess the cats out of the bag." He finished turning towards the girls as they both started chuckling. "What?"
"I guess you hadn't heard yet," Yui said as she calmed down. "We learned about the supernatural and who all is Devils from Asia not long before whatever happened to the future that caused us to go back in time."
Issei was stunned by that news, but now that he thought about it, he did remember hearing that Asia had a new contractor right before the Beast had broken free from the isolation barrier. Since it had happened the night before it broke free, he wasn't too surprised that he hadn't heard about it as everyone would have figured they had more time. "Now that you say that I do remember hearing that she had a new contract right before things went to shit." He said getting a pained expression on his face that the girls noticed, but he kept going before they could comment. "We'll come back to that as you knowing about the supernatural helps me out some. This might seem out of the blue, but how much do either of you know about the book of Revelations?"
"Not much honestly aside from what little I learned as a young girl."
"Well, just in case Asia hadn't been to tell you, but the Apocalyptic beast that was named 666 or Trihexa is real and was sealed in battle a year before you found out about us. The thing is the day after you found out, the Beast broke free from its imprisonment once again that we had been forced to put it in as we weren't strong enough to defeat it." He said before seeing the shocked faces coming from the two before he dived more into the first fight. Once that was done he got back to what happened right before he went back in time.
"When it broke free once more, we weren't able to do anything and I spent two weeks trying to do everything I could to defeat it but I wasn't able to and it killed all of our friends and my loved ones before I was whisked away by someone I can't say who due to a promise to keep their name a secret until the time is right, gave me the offer to send me back in time and grow stronger and one day be able to take down the Beast."
"Ok, I'm kind of with you so far, but what does that have to do with us regaining our old memories?" Yui asked, stunned at what they had learned so far.
"That's the one thing I'm not too sure on past that I did hear that people would have a chance to gain their memories back that were close to me or even enemies, but it would take a trigger of some sort for the memories to come back which I will know when it happens by the headache that hits me and the person that gets their memories back like you two did."
"That explains the headache we got and I think that if we hadn't already known about the supernatural this wouldn't have gone so easily," Yui said, getting nods from the other two as they thought about what all they had learned. "Do you have any plans on what to do now that you're in the past?"
"I plan on getting stronger as a whole to better deal with situations that I had issues with in the future timeline and honestly past that I've got a couple ideas, but nothing concrete." He said, before Red commented.
'Why not have them help you train with a sword Issei? While they might not have started any training at this time of their life, with their memories back now they should be able to help you some with the basics at least.'
'Not a bad idea, but we'll need to be careful and not use Ascalon since that might alert Heaven before we're ready.' Issei agreed though also had the thought, feeling that the dragons agreed with him, as he brought the idea up to the girls.
"If you are willing, would you two help me with sword training? I can't bring it out now but I have a sword I got as a gift from Heaven after the Peace treaty, which I can explain later if Asia didn't get to yet, and I need to be careful as I don't know how they'll react to me having it yet." He asked, getting a slow nod from the two.
"I'll help but only if you make sure to tone down your pervertedness this time around," Kaori said as she thought it might be a fun time, if nothing else, being able to beat him up some more.
"I can also agree with that, both of what Kaori said."
"Don't worry, that was already in the plans, as while it did help me out a lot in the last timeline, I know now how I should." He commented, getting relieved sighs from the girls and crying from DDraig as he heard it.
After that was done, the three of them talked a little more about what had happened in the previous timeline before the girls left for the day to get back home, not before they made sure to meet once again at the park the next day.
Scene Skip
After the girls left, Issei decided to go back to the park to see if he could catch Azazel there still and get that done too in one day. Thankfully it looked like he had just gotten back to the park right in time as Azazel was standing up to leave.
Waiting until he had mostly left and was out of sight of any other person, Issei stepped out of the bushes near him and held up his hand in a wave as while he knew Azazel was normally a calm man, he could also kill him in an instant if it wasn't handled right.
"Can I help you?" Azazel asked as he was surprised to see the boy back at the park as well as seemingly singling him out.
"I hope so, Azazel," Issei commented back, before catching a stunned look coming from him. "I mean no harm but I do know about the supernatural and just want to talk. I'll explain more once we get to a more excluded area, if you'll trust me."