Author note: Well you guys guest it right, the Auburn figure was Chelsea and in this chapter, she will interact with Issei and the kendo duo.

I'm glad that you guys are enjoying the story so far. And I will try to make it, moving forward is even more enjoyable for you guys. In the next chapters, we will get some fights scenes since we are moving from the Raynare arc to the Riser arc.

As for those that think it's strange and even a little forceful for the Kendo duo to have a crush on our loveable pervert, all that will be answered in the following chapters. So stay patient and it will be answered.

I would also like to thank Dazzazzel for helping me in fixing some issues with grammar and all of that stuff.

As always, feedback is welcome. If you guys have questions about the story feel free to PM me and I will answer as best as I can.

So, let's get started.

I don't own High School DxD that right goes to it's creator, Ichibumi Ichei.

Chapter 4. Unwanted Guest

After the lunch break that was fairly annoying for Issei, because he had to deal with people that hurt and betrayed him in the worst possible ways. Issei is now eagerly, with a bit of fear mixed in, waiting for school to end to see if the kendo duo were willing to help him with his problem.

As the school bell sounded the end of today's lessons he quickly packed his belongings and went to the gates to see what their decision was.

Not too long after he got there, the people he waited for showed up with a neutral expression on their faces that upset him a little bit.

"S-so guys what did you decide?" He stuttered as he was now a bit afraid of their refusal.

"We decided Ise, but before we tell you our answer, we need to know some other things, sounds good?" Answered Murayama as she looked at him with her neutral expression.

"Yeah, that sounds good, so what do you need to know?" He replied feeling a bit of hope since it sounded like that they accepted his request, but he tried not to show it.

"Well the things we want to know are a bit complicated to speak in public, so do you know any place where we can talk?" This time Katase spoke.

"Sure, we can talk at my place, my parents aren't home so it's secured to talk to about things that are private. And before you, Katase, go for the shinai no, I didn't think of that things." He quickly answered seeing that Katase was about to grab her sword to hit him.

"It better be like you said or I will put this sword in your ass, you got that?" Katase said with venom in her voice.

"It's like I said, you can trust me on that, I may be a pervert but I'm not a liar or a sexual maniac that will rape you two." Issei replied back.

"Fine lead the way." She said, accepting his words.

"This way ladies."

As they left, Raynare followed them with interest, since she too wanted to know what made Issei ask his arc-enemies for help and what the duo wanted to know.

So she masked her presence and went after them, what she and the trio didn't know is that the auburn-haired girl that was following Issei for a few days now was also following them now and she looked excited about the prospect of having some fun with all of them, so she hurried to get as fast as can to his house and set all hell loose on him.

After about fifteen minutes, the trio arrived at the Sekiryuutei's house that looked like the rest of the houses in the neighborhood. It was a normal two-story terraced house with a light blue exterior, a balcony on the second floor, and a brown roof.

"Well here we are, make your self-comfortable here, I will get some drinks and snacks." Said Issei as he led the duo into his house, not noticing another presence in his house.

Seeing that her camouflage and masked presence was working beautifully, the auburn teen decided to have some fun, that was why she came here for after all.

"Oh, honey you're home." She said in a sweet and seductive tone as she stepped out of the kitchen.

Hearing the voice Sekiryuutei immediately activated his sacred gear in front of the two girls as he stepped in front of them.

"Who are you and what are you doing in my house?" Asked Issei as he started boosting his power.

"Oh, my. Have you already forgotten about me? Shame on you my dear and here I thought that you loved me." She stated in a fake hurt tone as she put her hand over her heart.

While this was going on, Murayama and Katase were in shock. First, Issei said that he was alone at home and now from the looks of things it looked like he lied, the second was a strange looking gauntlet that appeared out of nowhere and what was even more strange is that is started saying "Boost" after every so often. And the third was the auburn teen that looked like she knew Ise very well.

After getting over their shock state they looked at each other and with a nod decided that they will going to milk every last information out of Issei for this. But for now their attention return to the girl that was standing in front of them.

And both girls could agree that she was very beautiful, with her long auburn hair that went down to her middle back, butterfly headphones accessory on her head. She wore a black vest along with a white long shirt that was under neat it with a red ribbon, a red mini skirt and had black leather boots.

"Cut the crap and tell me who you are and what are you doing here." Stated Issei feeling angrier at the unknown girl that was in his house.

[Boost]

"Oh, will you look at that. So the information about you was correct. You are the RED DRAGON EMPEROR." She said nonchalantly, as if she was used to seeing it all the time.

"Yes, I'm the current Sekiryuutei, now answer the damn question." He answered his voice becoming dangerous as he felt a little bit annoyed that she still didn't answer him.

"My name is Chelsea, a pleasure to meet you Sekiryuutei. As for what I'm doing here? Well, that's easy I'm here to have some fun. And don't worry I'm not here to fight, so can you please dismiss you sacred gear? Even though I may be stronger than you now, if you boost enough times you can easily beat me and from counting how many times you boost already, I will have to say that we are almost even now." The girl now known as Chelsea stated. She knew that her experience can get her an advantage over him, but knowing that one lucky shot from the powered up Sekuryuutei would spell instant death to weak opponents and heavy injuries to some average. She didn't want to test her chances with him yet if she can prevent that.

"And how can I trust you that the moment I dismiss my sacred gear you won't attack me or my friends behind me?" Questioned Issei. He was told by Ddraig that situations like this would happen when an opponent would try to make him lower his guard and when he was at his weakest attack him.

"I see that you thought about that possibility also but rest assured that I'm not here to fight, I'm more of an assassination than a straightforward fighter. If I was ordered to kill you, you would have been dead long ago, as I had plenty of opportunities to do it." Chelsea stated calmly as she took out a lollypop out of her skirt pocket and put it in her mouth.

"So what are you doing here then, besides having intruded into my house?" Issei asked as he saw that what she said was the truth.

"Why don't we all sit down and talk about, hmm?" Said, Chelsea, as she made her way on to one of the sofas in the living room.

"Umm, Issei, you do know that you have a lot of explaining to do, right?" Said, Murayama, as she and Katase finally able to get a word out since they felt the dangerous situation in front of them vanish and what the Chelsea girl said made them shiver in fear.

That made Issei went paled as he forgotten that the duo behind him didn't know anything about the supernatural world and he knew that once you entered it there was no going back. He sighs heavily as he decided that if they were going to help he would at least tell them what they wanted to know.

"Yeah I know, but let us first sit and then we will talk about it." He answered back as he went to the kitchen to get some drinks and snacks.

After a minute or so he came back with a tray of food and drinks. He put them down on a table and prosed to sit down on a love sofa so that he could see all three girls, Murayama and Katase took the large sofa as they sat near each other.

"Okay, before you two begin to question me, let's see what our new friend is doing in my house, sounds fair?" He asked the Kendo duo and seeing them nod made him smile a little bit. Before he turned his attention to an intruder which he could honestly say was extremely hot and if the situation was different he would be all over her in a blink of an eye.

"Since you insist darling." She smirked when she saw a little jealousy in the brunet haired girl's eyes, but she had to first defuse the tension that was in the room before she could tease the life of the girl and the boy which she found to be very cute and handsome.

"Like I said, my name is Chelsea and I was assigned to watch over you and see if you have a sacred gear. And if you have, to see what in turns of power level is. If you where at a lower level of power, I was told to bring you with me, to our faction with force if necessary. But seeing that you already have activated it and that you have I would say decent power, I think that that wouldn't work, so I choose another way, to come directly to you so that we can talk and see if you are willing to come with me, darling. We could have so much fun together." She said in a normal voice in the beginning and ended in a flirty and seductive tone while licking her lips which made Issei go full red that put even his gear at shame.

Murayama seeing this decided to make her self-known to the other girl. As she didn't like an idea of Issei leaving when she was so close to having him.

"What are you talking about? What faction? And what is a sacred gear?" She questioned as she wanted answers and seeing Katase nod her head in agreement with her.

"Well, I can answer the first two questions somewhat, but I will let my darling answer the last one." Was the reply she gotten from the Auburn teen.

"Don't call him darling." Sneered Murayama as she felt that she had little chances against the girl in front of her. She was very attractive and from the look in Issei's eyes, Murayama knew that she was losing the battle over him.

"Oh, jealous about my interaction with my dear little Issei." She questioned with a smirk at seeing the brunet becoming red with each passing second from embarrassment and anger.

"T-That's not what I meant." Murayama stuttered as she felt her cheeks blush even more than they were a moment ago.

"You sure about that?" Chelsea sends another jab at her, she loved this, her mischief side was now in full force and he would enjoy this sweet torture for as long as she can.

Unfortunately for her, Issei decided to enter the conversation and release Murayama from even more embarrassment. He knew that she had a small interest in him, since every time he was caught Murayama would hold back a lot as to not hurt him to badly and would avoid sensitive parts. And if he was honest with himself he did have a crush on her since day one at Kuoh Academy.

"Okay Chelsea, I think you had your fun. Now answer the questions." He stated seriously as he was also curious about this faction she spoke about.

Chelsea cutely pouted at her fun being cut short but decided that she would continue later on.

"What I'm talking about is that there are other factions in this world, not just humans but you already know that my dear." Chelsea said as she looked towards Issei and then to the duo on a sofa. "As for you two, Murayama and Katase, yes there are other factions, like devils, angels, fallen angels, vampires, youkai, and so much more. And before you ask how I know your names, the answer is simple. I was also following you two also since you knew Issei and interacted with him on the daily basis. " Answered Chelsea while drinking some juice and eating some snacks that Issei brought for them.

That left the girls on the edge, to hear that you were followed by an assassin no less was a hard pill to swallow for anyone. And the discovery that the mythical beings exist was even more of a shock to the girls.

"Wait so what are you saying is that mythical beings like devils and angels really exist?" For the first time since this conversation started Katase spoke in disbelief.

"Yes, they exist, my darling here is a proof of that, aren't you my sweet and cute little devil-dragon?" Replied Chelsea with a smirk, while making Issei blush and Murayama even angrier at the flirting that the auburn-haired girl was doing with her love interest. But what she first said died her anger down.

That little revelation left the kendo girls looking at Issei like he had grown a second head.

"Issei, is she saying the truth? You aren't human?" Murayama spoke in a saddened tone.

"Sorry but no, I'm not a human anymore. Well, not 100 %, but since I was born I wasn't completely human." He answered as he looks over from Chelsea to the duo at the opposite side.

"Then what are you?" Asked Katase with a little edge in her tone that made Issei flinch a bit.

"Well, I'm from what I gathered, a 50% devil, 35% human and 15% dragon. But as you can see I look like a normal human being." He answered in a soft tone.

"Okay, then that lead's as to the next question, what faction are you from?" This time it was Issei who asked as he looked at Chelsea with a serious look.

Chelsea for her part blush a little at the gaze that made him look even cuter and more handsome in her opinion and if what she knew about Issei was correct she wouldn't mind being with him even in a harem since she knew that that was his dream. To become a Harem King. She also caught him a few times looking her over, he gave her body a complete scan which she found amusing and flattered that she was attractive to him.

"As much as I want to answer your question my dear, I can't, at least not until you decide to join us and then I can answer any question you ask or you desire." She seductively answered with a wink. "But that is it for today, I must be going home now, it's getting late and I need my beauty sleep to look good for you. And don't worry we will see each other soon you three. Bye." With that Chelsea stood up but before she left, she quickly gave Issei a kiss on the cheek that made him turn crimson red with embarrassment and the girls red with anger. All of that made Chelsea giggle at the amusing sight as she left two fuming girls and one stunned boy in its wake.

"Ahem... now that that's over. Issei, before we give you our answer to your request we need to know some things." Said Katase as she was the first to return to normal, while Murayama looked like she was ready to murder someone.

Issei for his part was still in shock over the kiss, but one look from Murayama that could prone instant castration and chopping of the head was enough to bring him back. What did that Chelsea girl did to make her so pissed of, was beyond him.

Murayama was now in her on world, planning how to deal with this auburn teen that was stealing her Issei from her.

'Oh you just wait bitch, I'm going to enjoy chopping your head and putting it on a pike when I'm done with you. No one is going to steal him from me, not now when I have a chance to bring him back to normal and be with him.' Thought menacingly Murayama as her eyes darken at all the murderous ideas she could do run through her head.

Issei and Katase gulped, paled and backed away as they saw her lips turn into a sadistic smile that in Issei's opinion would put even Akeno's best to shame.

"Well Issei, I think it would be wise to answer some questions before Mura goes on to do what ever that smile on her faces represent. Don't you agree?" Katase asks hoping that she could break the dark thoughts in her best friends mind. Not wanting to get a beat down from her friend when Katase hit Issei in his family jewels.

Issei just nodded his head in acknowledgment not daring to speak.

"Okay, you said that you are a devil now, who are also devils that you know?" Katase asked that question made Murayama break from her thoughts of murdering the auburn girl, to look at him and waiting to hear his answer.

"Well, as far as I know, all member of ORC are devils. And Rias Gremory is our King." Answers Issei quickly and honestly, not wanting to fill the duo's wrath.

"W-Wait all the members are devils even Yumma and Kiba?" Murayama questioned.

"Yes, Kiba was devil long before me and as for Yumma or should I say Raynare, she was only turned devil when I intervened with her death. She was a Fallen Angel before." He said, as he was still haunted by what he experienced with Raynare and his discovery in the church.

"Raynare? Rias? And how did you become a devil Ise?" Katase was next to ask and to Issei, it looked like that they were synchronized with each other.

"Yes, Yuuma Amano or Raynare was a Fallen Angel until a month ago. As to how I become a devil well let's just say that a spear of light, courtesy of Raynare and Rias intervening when she did, was all that took." He answered in a tone that gave both girls a signal that he wasn't ready to tell them and that he wanted to forget that day.

"So Rias saved you in the end, is that what are you saying, Ise?"

"In a way, look guys I'm still not ready to tell you what happened, so can we just skip it and get to the next question?" He said as he looked Katase in the eyes.

"Yeah, we can do that, so what is a Sacred Gear? That Chelsea chick sure knew about it." She continued seeing that it was still a sore subject to him.

"Sacred Gear are item's made for the human's from God of the Bible. There are many Sacred Gears and they are connected directly to users soul. Raynare has Twilight Healing and before you ask she stole it from a human. I was born with the gauntlet of Red Dragon Emperor which you saw, Kiba has one that makes sword's and so on." Issei said as he thought about it who of the ones he knows have some, but none came to his mind.

Satisfied with his answers, for now, both girls nodded and answered he's unspoken question.

"Well, we come to an agreement that will help you with your problem, but know this now, if you do some thing's that we think are wrong you can expect a shinai up your ass. We will start your training tomorrow after school at the Kendo Club. Do we have a deal?" Said Katase as she stood up and extended an arm to him.

Seeing this Issei felt joy and immediately agreed to their demands full heartily as he shook her hand.

"Yes, we have a deal. Now though, I think you two should go home, it's getting late. I will escort you back, now that you know of this world that I'm a part, anything can happen, better safe than sorry." Issei stated as both he and the girls went out.

As they were walking toward Katase's home, they had a small talk about what they were going to do and how were they going to help him. To say that Issei would be going through a world of pain was an understatement. He thought that at the end of his training regiment with the duo he would be able to take Ddraig's strongest attack head on and feel nothing. He knew that he was exaggerating, but still, from what he was told it didn't sound so much far from it.

After about ten minutes they left Katase at her front door and then went to Murayama's place, as Murayama talks about how he was going to train in Kendo to improve his stamina also to increase his reflex speed he felt that this part of the training wasn't so bad, but then again, he was going to be proven to be wrong so many times that he still didn't believe it was all that good.

As they stopped in front of her house, Murayama turned around to look at him before speaking.

"Well this is my stop, thank you for escorting us home Ise, you are really a gentleman when you are not being a pervert. I like this side of you better than when you're a lecher. Thank you again and I will see you tomorrow."

"Yeah, see you tomorrow and have a good night." Said Ise, but before he could turn around and walk away he was suddenly grabbed by Murayama as she kissed him on the lips for a few seconds before running into the house with a smile on her face and leaving a stupefied Issei in front of her house.

'What just happened?' He thought as he was shell-shocked that the girl that hated his guts just kissed him on a lips. To think that he was kissed by two girls in one day was unimaginable to him.

[What just happened, partner, was your dragon part doing it's magic. Like I told you, you unknowingly attracted those girls to you, that is what happens when they are exposed to your aura for a long period of time, they become attached to you.] Ddraig answers his thoughts as he saw all that happened to his host this day and to say that he was impressed at the speed that his host made two girls to show affection towards him so quickly was something that even he couldn't do.

'Ddraig, do you think that that Chelsea girl is a threat ?' Issei ask he started walking home after a few minutes of being in a shell-shocked condition after what happened.

[To be honest I don't know yet, I didn't see her abilities, but what is for sure is that she has a powerful Sacred Gear that in right hands could spell death to anyone. Best to be on your guard Partner, you never know what can happen next.] Spoke the Red Dragon as he felt the presence earlier but didn't want to alert his host as he didn't feel any malicious intentions towards him from the girl.

'Yeah, I guess your right. Now though that leaves us to what we should with Rias and her gang.'

[You don't need to worry about them Partner, as you are now, you can probably take the midget Rook, the Blonde Knight and the crow easily, but her Queen is on another level compare to you. You still need to improve your stamina and durability.] Said Ddraig .

'You really think that I improved that much Ddraig.'

[Yes, and if you continue to improve. At this rate you will be able to match your King in no time.]

'Thanks pal, that coming from you means a lot.'

[Any time partner, now I'm going to sleep, so when you need me you know how to call me.] With that said, Ddraig cut the connection as he went to his slumber leaving Issei alone, as he entered his home and went to bed.

Just as he was about sleep a red magic circle appeared in his room and from it came Rias, as she looked depressed.

"R-Rias, what are you doing here at this time of night?" Asked Issei as he was confused as to why she was here.

"Sorry, Issei but I have no choice." She spoke as she quickly claimed on top of him and started undressing.

"W-what are you talking about? And why are you undressing your self?" He questioned as he felt uncomfortable.

"You are the only one that will do this for me Ise, Kiba won't do it since his knight's pride won't let him and I can't think of anyone else. Now stay down, I will do the rest." She answered as she unhooked her bra and threw it away.

Issei, hearing this started to get angry, sure he was glad and was looking forward to having sex with her, but the way it sounded and what she was doing was that set him off. She was using him again for her selfish things. And he hated being used.

"And why do you thing I will do it with you?" He asked as he started to pick himself up and pushing Rias away from him.

"What? Am I not good enough for you?" She questioned, with her eyes slightly narrowing.

"That's not what I me.." He didn't finish his sentence as he saw another magic circle that he didn't recognize.

As the circle shined brighter a figure appeared out of it.

When the light died down Issei was left like he just saw a figure revealed itself to be a beautiful woman in her twenties, her hair, which flows all the way down to her back, featured a long braid on each side with small blue bows at the ends, while the rest is let down, ending in twin braids.

She was wearing a maid outfit that made her look in his opinion even sexier.

Seeing her Rias just sigh as she knew that it was too late for her plan to work.

"So what brings you here Grayfia? Was it father, brother or is this of your own accord?" The red-haired princess asked as she lifted herself from her pawn.

"On all three accounts my lady." The woman known as Grayfia answered in a regal tone that very impressed Issei.

"Why do lower your self to this worthless specimen, my lady? You should know better than to expose yourself to the lower classes, you are the heiress of the Gremory after all." Said Grayfia as she looked at the position the two teens were.

Issei didn't know if he felt insulted or to be thankful to the maid for stopping Rias. So he settled for both.

"You know I'm not some peasant, lady." He told her sharply. That made her looked at him and just raise her eyebrow at him.

"Grayfia, even though you are my brother's Queen, I will not tolerate how you treat my cute and adorable servant. Is that understood?" Rias said as she relisted a small amount of her power to show her point.

Grayfia knew that even Rias and her peerage combined couldn't stand up to her even at 10% of her full power, but she also knew that she couldn't do anything to her since she was the little sister of her husband and he was way, way overprotective over his little sister. So she just did what was expected of her.

"I'm terribly sorry for my words. My name is Grayfia Lucifuge, the head maid of the Gremory and the Queen of Rias' brother." She stated as she bowed.

'Rias never told me that she had a brother' Issei thought until he remembered that he didn't show at the clubroom for more than a month, so even if she wanted to tell him, she couldn't.

"Apology accepted. My name is Issei Hyoudou, the current Sekiryuutei and the Pawn of Rias Gremory. It's pleasure to meet you Grayfia." He said as he stood up and bowed to the maid. Grayfia widens her eyes a little bit at hearing that her sister-in-law had gained a very powerful piece.

"Now that the pleasantries are over, my lady we need to go. We have a very important meeting to attend to." Stated Grayfia as she dressed Rias and a little later activated her circle.

"Can Akeno come with me?" Ask Rias as she was now drees.

"Princess of Thunder? I see no problem in that. It's acutely a very good thing to have a King escorted by his Queen." Was the reply from the silver-haired maid.

With a nod, Rias turned to her Pawn and kissed his cheek. "Let's forget all about this Ise, I will explain everything in the morning. Please come tomorrow." Said the crimson princess as she teleported with the maid.

As soon as they were gone, Issei asked his Partner about the Queen of Rias's Brother.

"Ddraig are you awake? I need to ask you something."

[Yes partner, I was awoken by a sudden increase in magic. You want to know who that maid was and about her master?] Question Ddraig, as he could clearly feel that the maid was still as strong as he remembered.

"Yes, if you know about them, maybe that could help in the future." Issei replied.

[I do know about both of them. And from the look of things it looks like they are still as I remember them. That maid was and still is the second strongest female devil in the underworld, second only to current Maou, has mastery over Ice and if I remember her sister also has it but with a mix of light. Sadly, I can't remember her name but I did remember how she looked like and if ever cross path's with her, if she is alive of course, I will tell you if it's her. As for her master, he is the one of the three known Super Devils. Sirzechs Lucifer, the master of the Power of Destruction that your master has but only on a much, much higher level.] Answered Ddraig as he still tried to remember about a little girl that his last host.

"Wow, they are that strong Ddraig?" Asked Issei as he felt that even at his full power and then some he wouldn't stand even a second against any of them.

[They are partner, and I won't lie. If you want to get your own peerage, you would need to up your training regiment even more. But we will need to find a strong dragon to train you. Since only a dragon can train a dragon. And you need to be ready for pain, a lot of pain if you plan to go to the next stage of power and unlock Balance-Breaker.] Said Ddraig with a battle-hungry smile at a thought that his partner was going to get to fight a strong opponent and that he was going to fight someone that was at his level or higher.

Issei just sweated and shivered at the thought of having to train and maybe fight against the Full Grown Dragon.

"Yeah, that sound's like fun." He said sarcastically as he sounded terrified of that idea.

As he finished his conversation with his dragon resident, Issei fell to sleep having no idea what was going to happen tomorrow.

As the morning came, Issei woke up having a very bad feeling about this meeting at the old school. With that in mind, he got ready and headed to towards school.

After about ten to fifteen minutes he arrived at the clubroom only to be surprised at seeing the maid standing beside his King.

"Oh, Ise you made it. That's good now we can start the meeting." Stated Rias as she felt a little at ease that her Sekiryuutei had finally arrived.

"My lady do you want me to tell them?" Grayfia asked politely

Shaking her had to the sides Rias replied, "No, I will tell them after all this is my problem and my peerage should hear it from me."

Taking a deep breath, Rias started to say until something interrupted her

"Everyone, the truth is that I'm in enga..."

Everyone turns to look at what stopped her from saying anything further and what they saw was a magic circle with an unknown symbol to Issei at least.

Though that only lasted for a moment since Rias answer his unasked question with venom in her voice.

"Phenex."

And done.

I hope that you liked how I made Chelsea look. I will confess I didn't read or watch till the end AGK to the end but I hope that you will forgive me if I made her too much OOC.

And to answer your questions that are sure to come. Yes in my story Grayfia is going to have a sister and a brother (you know who he is if you read the LN). But I will not answer who is going to be her sister yet, you will find out in a few chapters. As for why Murayama and Katase felt jealousy. I will answer that latter in a few chapters so don't worry. It will have a very logical explanation. Now you may ask what about Raynare that appeared in this chapter but didn't do anything. Well, let's say that in the next she is going to make Issei extremely uncomfortable.