Hello readers, first of all, thank you for the reviews. I was really surprised when I read 11 reviews on the first day. Also, I will change a few things, like making Tsukuyomi female. Now to answer a few of the reviews:

DraigTrueEmperor9: Sorry to disappoint you, but he will join. Although he won't be so attached to her like normal, since he is only doing it because it was a request.

Thatrandomguy42: She won't, but she will change her body occasionally.

Will: Yeah, I got the idea after reading it. And of course it will be a harem, it wouldn't be DxD if not.^^

Chapter 1: The new boy at Kuoh

Issei was in his (and Ophis) room looking into a mirror. He is wearing a black blazer over a white, long-sleeved dress shirt with black highlights and a black ribbon on the collar, matching black pants and brown dress shoes. It was the typical boy's uniform for Kuoh Academy, the school Issei will attend from now on. 'I can't say why, but it doesn't sit well with me.' He grumbled in his thoughts and grabbed a red T-shirt, putting the white dress shirt and the blazer over it, leaving it unbuttoned. ''Yeah, that's better.'' He took his bag and walked down to meet up with Ophis. She was already eating, getting a second (fifth) serving. The boy took the seat next to her. ''Good morning Mom, Ophis-chan.'' His father was away working, so it were only the three of them. His mother smiled at him, but his friend turned her head away. 'Is she in a bad mood? Well, she was against me going to school, so I guess it can't be helped.' The dragon got really possessive and overprotective after the incident with Shalba. There are only a few people who were allowed to be alone with Issei. First would be Amaterasu, the Shinto goddess of the sun. She had a motherly aura whenever he was around, but was also very clingy and spoiled. The second one would be Serafall Leviathan, one of the four great Maou and a Mahou-Shoujo fan. They would often watch anime after the training, with Serafall, now because Issei is taller, sitting on his lap. Other exceptions would be the greek goddesses Athena and Styx. Athena was his tutor and Ophis liked Styx, because of her silent nature. By the way, Zeus is forbidden from seeing Issei, because he once tried training him by throwing lightning at him. The only others were Sirzechs Lucifer and his wife Grayfia, Ajuka Beelzebub and the Shinto goddess of the moon, Tsukuyomi. Issei finished his breakfast before he noticed. ''Ok, I will go now. I will see you after school, Ophis-chan.'' He patted her head, making her close her eyes and smiling. ' She's really like a small animal. As long as she doesn't go into 'older sister'-mode.'

''Nnnnnnnh, bye Ise.''

(...Kuoh Academy...)

The boy walked past the gate, sighing in relief. 'It took me a week to asure Ophis-chan that I won't get in trouble. And now I'm already stalked on my first day!' He noticed the presence of a fallen angel when he was on a bridge. It wasn't hostile but he still had a bad feeling about it. 'Sirzechs-sama and Sera-san said that their little sisters are in this school, but they didn't tell them about me so it should be alright.' Issei was now in front of his classroom, waiting for his teacher to call him. ''Eh, I know this is a bit sudden, but we will have two new classmates. Come in.'' Issei opened the door and stepped in. 'Wait, two?'

''Pleased to meet you, my name is Hyoudou Issei.'' He said and gave a polite bow. ''Pleased to meet you, my name is Amano Yuuma.'' He looked to his left side to see the fallen angel he felt before. She was a young, attractive woman around the same age as Issei with long black hair down to her hips and violet eyes. She wore the typical uniform for girls, which consists of a white long-sleeved, button-down shirt with a black ribbon on her shirt collar worn under a black shoulder cape and a matching button-down corset, a magenta skirt with white accents, and brown dress shoes over white crew-length socks. ''Wow, she looks like a model!''

''Man, she's hot!'' The boys happily welcomed the new girl in their class. The girls squealed when they saw Issei. ''He's a new prince!''

''Look at his eyes, they are so innocent!''

''He's like a little child!''

'Prince?' Issei sweatdropped at the comments and took his seat. He was sitting between a bald boy and a boy with glasses. ''Hey, Hyoudou-kun. What is your favorite part of a woman?'' Glasses asked him with a perverted grin on his face. Ise tilted his head. ''My favorite part? What do you mean?'' The perverted duo wanted to answer him, but the girls dragged them of and started to beat them up. ''Don't infect Hyoudou-kun with your pervert disease!'' He thought that he shouldn't get involved with them and concentrated on the lessons. He remembered the training he did with Amaterasu. She teached him fire manipulation and how to use her black flames, he can even recover energy in the sunlight, although only very slowly. She was almost as overprotective as Ophis, but she was way more spoiled. Issei is now seventeen and she still insists that he calls her 'onee-chan' or at least 'Ama nee-chan'. He shaked his head and turned his attention back to the blackboard.

(...After school...)

The boy walked out of his classroom, until he heard his name. ''Hyoudou-kun~!'' The female transfer student walked over to him, waving her hand. ''Amano-san, right? Can I help you somehow?'' Said girl stopped in front of him, blushing and playing with her fingers. ''A-are you seeing someone at the moment?'' Amano blushed even more. 'Seeing someone?' Ise was confused by the question, since he mostly trained or learned and never had a relationship with a girl. ''No, I don't?'' Amano's face lighted up immediatly and she grabbed his hand. ''I-is that so? Thank goodness, A-ah... sorry!'' She let go of the hands.''U-uhm, If that's so, would you please go out with me?'' bowing down, she asked him. ''E-eh? I don't mind...'' Issei was still unsure what to do. ''Really?! Great, then can we meet this sunday at the station?'' They exchanged phone number via infrared and Yuuma ran away as soon as they did that. 'She's a strange one.'

(...Issei's room...)

Ophis was playing a video game, eating snacks every now and then. The Hyoudou residence was a large, six-story house with three large basements. Sirzechs Lucifer made the reconstruction saying that it will be necessary in the future. Issei walked into a room on the second floor, spotting a girl sitting on his bed. ''Ophis-chan, I know you like it in here, but your room is exactly the same.'' He put his school bag down and laid down next to the girl. ''Ise, play with me.'' Ophis handed him a controller. ''Yeah, but don't forget that Styx-san will come later.'' The goddess liked Issei, because he is not afraid of her. He even hugged her in his sleep, which resulted in Ophis not letting him go for five hours. ''Don't worry, I won't forget it.'' She pouted and sat down on his lap as soon as he rose up.

(...Occult Research Club...)

''Bucho, is something wrong?'' A girl with a buxom figure around one year older than Issei with very long black hair and violet eyes asked. Her hair is tied in a long ponytail, reaching all the way down to her legs with two strands sticking out from the top and sloping backwards, with an orange ribbon keeping it in place. ''Ah, Akeno. No, I was just lost in thoughts.'' A beautiful young woman who appears to be in her late teens with white skin, blue eyes and a buxom figure answered. Her most distinctive feature is her long beautiful crimson hair that reaches down to her thighs, with a single hair strand sticking out from the top. Her hair also has loose bangs covering her forehead and side bangs framing her face. ''The boy who transfered into the secound year today, do you know something about him?'' Akeno served the redhead a cup of tea, tilting her head at the question. ''Ara ara Rias, are you this interested in our kohai? All I know is his name, Hyoudou Issei-kun'' Rias put a chess piece on the board that was on the table. ''Who knows? Checkmate, I will take a shower.'' She walked off to the shower inside the clubroom, starting to undress on the way. ''And here I thought I made the problem more difficult this time.''

(...Takamagahara...Ten years ago...)

Issei was watching one of his two teachers, Tsukuyomi, drawing a complex structure, made out of six magic circles connected into a hexagon form, onto the ground. The structure glowed in a light blue and silver shine once the goddess stood in the middle of the completed magic formula. ''Issei-kun, watch closely. This is one of my strongest barriers, [Sixfold Moon Prison]. In about six or seven years you will be able to use this. I want you to read the flow of the energy.'' She said it and light pillars shote up from the ground, the gape between the pillars was closed up by a wall of two layers of energy. The walls looked like they were made out of crystals, shining in blue, silver and purple. ''And Issei-kun what do you say?'' She turned around to see the boy looking at her with wide eyes. ''Beautiful... You're sparkling and shining...'' Tsukuyomi, blushed at the comment from the little boy, but tried to cover it up. ''S-so, what do you say?'' The boy tilted his head. ''It looks really strong, but doesn't it take too long to prepare it?'' The goddess was surprised at the sound argument of her pupil. 'He's a lot smarter than I thought.' The barrier dissolved and his tutor walked out of it to pat his head. ''That's right, Issei-kun. It's used to defend something, but you need to set it up first. You normaly use it to guard a shrine or fortress.'' Issei closed his eyes, thinking and enjoying the patting. ''Tsukuyomi-sama, do you use it to defend your shrine?''

''Yeah, that's right. But I'm using an even more complex version, since humans and other beings with my permision need to be able to get into the shrine's ground.''

''Wow, Tsukuyomi-sama is awesome!'' The goddess again blushed at the sudden praise and was glad he couldn't see her face. ''But I'm still better.'' Tsukuyomi's face hardened as soon as she heard the voice. ''Onee-sama, what business do you have with me?'' Amaterasu walked over to them, her smile never leaving her face.

''Don't be like that. I just came to get Ise. So, Ise come here.'' Amaterasu crouched down lured the boy to her. The goddess of the moon grabbed him from behind and pulled him closer. ''Issei-kun is training with me for the whole day, onee-sama.''

''Tsukuyomi, you shouldn't squeeze him so tight, your bones will hurt him.'' Said woman had a bright red face. ''I'm not that flat!'' The black haired woman had a triumphant smile on her face. The goddess of the moon had long silver hair, crystal clear gray eyes and pale white skin. She was dressed in a blue and black yukata with a red obi. When Amaterasu is a curvy woman, then Tsukuyomi is a ...tall, little girl. ''Ise. You want to come with onee-chan, right?'' He remembered the incident last week were he said that he likes Ophis more than her. The goddess hid herself in her room '' Tsukuyomi-sama, I think I should go with her, before I end up as a hugging pillow again.''

''O-okay, even I would be afraid of that.''

''What are you two whispering about? Ise, let's go.'' The blackhead grabbed the hand of the boy and walked of to her veranda. ''Hey, why don't you ask Ouroboros to let you stay overnight?'' She asked him, handing him a cup of tea. 'So I'm still going to end up as her dakimakura... She's a lot like Ophis-chan in that way.'

(...Present...)

A girl in a pitch black one piece appeard in front of a room. She had long black hair down to her hips and amber coloured eyes. ''Ise~, I'm here to play~.'' The girl walked in and jumped into Issei's arms. ''Styx-san, you're in an awfully good mood today.'' The boy started to pat her and she pushed Ophis from his lap to sit down there. The dragon didn't liked the fact that her favorite place was taken from her. ''River god, that's my place...'' The goddess simply ignored her. ''Ise, what do you want to play? Video games or a board game?'' She was swaying her legs with a smile on her face. Ophis body was engulfed in pitch black energy, startling Issei. 'N-no, she entered 'older sister'-mode!' Out of the energy came a fully grown Ophis with a figure like one of the three onee-samas of Kuoh academy, Himejima Akeno. ''Ise~.'' She reached out to him and pressed the back of his head into her bossom. 'She's a lot like Amaterasu-sama in this form... I sometimes wonder if they're sisters. Wait, that's besides the point!' The dragon patted his head and glared at Styx. Both of them starred at each other, Styx still on his lap. 'I can almost see the sparks! Ah, that's...!' His table glowed in a crimson light. ''O-ophis, t-the table, the table!'' They stopped their cat fight and looked over to the light. ''Lucifer, what could he want?'' The light faded and the image of a man with crimson hair stood on top of the table. ''You're as popular as ever, huh Ise-kun?'' The man gave him an amused smile. ''Sirzechs-sama, is something wrong? It's rare for you to suddenly call us.'' The man looked to the side avoiding eye contact. ''W-well, I wanted to ask whenever you already met my little sister or not?''

''No, but I heard about her in school. She is one of the three onee-samas and the president of the occult research club.''

''As expected of my little sister. So, could you do me a favor?''

''A favor?'' The boy tilted his head and the two woman narrowed their gazes. ''A-ah, I originally wanted you to join her peerage, but I guess I can forget that after that incident. So could you please help her train them, if she asks you?''

(...Underworld...Seven years ago...)

Issei was inside Serafall's room, sleeping after training and another anime marathon. He rolled to his left, so that he is now on his back. Feeling cold, he wakes up to see the Maou standing in front of him, spreading her arms. He looked down to see several chess pieces put on his chest. ''Oh, Ise-chan you woke up! Don't worry I will finish this real quick!'' She said it cheerfully, giving him a wink. ''No, Sera-san, what are you doing to me?! Aren't this [Evil Pieces]?!'' The girl was as carefree as ever. ''Yeah, I wanted you in my peerage!'' Serafall's smile suddenly faded when she felt a wave of killing intent. She slowly turned around. ''O-O-Ophis-chan, w-w-why are y-y-you h-here?'' The Maou, the only one who calls the dragon '-chan' aside from Issei, had cold sweat all over her body. ''Issei, always sleeps with me, so I came, to sleep together.'' Ophis made an innocent statement with the most scary expression the other two ever saw. Issei gathered his courage and moved forward. All of the killing intent vanished as soon as Issei put his hand on top of her head. 'Memo to myself, always have Ise-chan around or I could die...'

(...Present...)

''I don't mind helping her, but you said she doesn't know me, right?'' The redhead made a smile at the comment. ''Ah, you don't need to worry about that. I think that you have a great appeal to supernatural beings, especially female ones.'' Styx made a wry smile, while Ophis once again pulled him to her. ''Well, I don't want to disturb your time with the two of them. See you some other time, Ise-kun.'' He said and faded away. ''Since he is away now~, let's play Ise~!'' The greek handed him a controller, to play the game Ophis was playing before. The dragon god took the controller out of her hand and put her hands around the boy. ''I, will play with him.'' They started another cat fight, rolling around on his bed. ''Please get along already~ ~ ~ ~!'' The complains of the boy were unheard.

(...Next day...)

Issei only slept for 3 hours, since the other two wouldn't stop their fighting. He walked into his classroom and searched for a certain blackhead. 'Where is Amano-san? Maybe she's late? But to be late on her second day...' The boy sat down and let a tired sigh out, when it suddenly got black. ''Who am I~?'' A girl said it in an cheerful voice. ''Why are you so happy, Amano-san?''

''Buuuh, call me Yuuma. And of course I'm happy, we're having a date at sunday, remember?''

''Yeah, I know...'' Issei tilted his head. 'Is that really a reason to be so happy? I will ask Sera-san what you do on a date, later.' Yuuma wanted to say something, but the homeroom teacher entered the classroom. ''Ok, take your seats.'' He didn't pay attention, since he already knew most of it. Having a greek goddess of knowledge as a tutor is really an advantage. The bell rang and Yuuma walked over to Issei, but someone was faster and called him before she had the chance to talk to him. ''Nice to meet you, Hyoudou Issei-kun. I'm Kiba Yuuto and I was asked by Bucho to bring you to the club.'' A handsome young man with short blonde hair, grey eyes and a mole under his left eye made a polite smile. 'Nobody wants you around, you annoying devil! Don't interrupt my time with Issei-kun!' The fallen angel glared at him, but he completely ignored it. ''Yeah, it's nice to meet you. Do you want me to go now?'' Issei, having noticed that Kiba is a devil, was sure to answer the call. 'I think I saw the Gremory crest faintly, when he reached out to shake my hand. So that means I will meet Rias Gremory-senpai.'

''No, I just wanted to inform you, that I'm going to get you after school. Is that alright?''

''Yeah, I don't mind.'' The two boys smiled at each other and Kiba left. But Issei didn't get a moment for himself. ''Issei-kun~, let's eat together.'' His girlfriend held a big bento in her hand and ran over to him. The boy looked confused about the size, but decided to not point it out. She slammed the box down and unfolded the three smaller boxes onto the table. ''Now~, say ahhhhh~.'' Yuuma moved a slice of pork near his mouth. 'S-she can't be serious... Getting feed is really embrassing.' He remembered a incident eight years ago, when Ophis saw a couple feeding each other. She would mimic most of the activities from couples. Even now, she insists on feeding him sometimes. ''Come on, say ahhhh~.'' The girl made a cute pout and shoved the food closer to his face. ''A-ahhh~'' Issei could feel the glares from his classmates, envious ones from the girls and hateful ones from the males. ''Eat more, you need it.''

(...After school...)

Like promised, Kiba met Issei after the last lesson ended to take him to the clubroom. He knocked onto the door twice. ''Bucho, I brought Hyoudou-kun.'' He said as he entered. ''Thank you, Yuuto.'' Issei entered the room after him, but he could hear the sound of a shower. 'A shower in a clubroom? And why would she use it now, when she's the one who called me... She's definetly Sirzechs-samas little sister.' A woman with black hair, tied in a ponytail, handed the woman in the shower a towel. ''Thank you, Akeno. Sorry to make you wait Hyoudou Issei-kun.'' After five minutes of drying and dressing, Rias sat down onto the couch. ''I don't mind. So Gremory-senpai, why did you call me?'' She had an amused smile on her face. ''Say Issei-kun, do you believe in the existens of supernatural beings?''

''Yeah, I do...'' He took a step back. 'I have a bad feeling about this.'

*pop* *pop* *pop* *pop*

Four pairs of wings popped out of the backs of the four devils. ''Then it simple. I am Rias Gremory, a devil, and this is my peerage. My queen Himejima Akeno.'' She pointed to the girl with the ponytail, who bowed in return. ''My rook, Toujou Koneko.'' Koneko is a petite girl around 15 years with white hair and hazel eyes. The front of her hair has two long bangs going past her shoulders and several loose bangs hanging over her forehead, while the back has a short bob cut. She also wears a black cat-shaped hair clip on both sides of her hair. She wears the Kuoh Academy girls' school uniform, without the shoulder cape. The rook gave him a nod and resumed eating snacks. 'She reminds me of Ophis-chan... I think we will get along.' Rias resumed her monologue, whenever he listened or not. ''And you already know my knight, Kiba Yuuto.'' The two boys smiled at each other and gave a nod. ''And I would like you, Hyoudou Issei-kun, to join us.'' The redhead reached her hand out to him. ''U-uhm, I feel honored, but I just can't say yes, when you ask me out of the blue.''

''Of course, you don't have to decide now. I just wanted you to know your possibilities.''

''Ok, I will think about it. Now if you will excuse me.'' Issei made a polite bow and left the room. Akeno made her way to her king with a cup of tea. ''Looks like it didn't go too well, Rias.'' She had her trademark smile. ''*sigh* I can't believe he rejected it immediatly, but I won't give up. I want this boy.'' The redhead looked like a small child, thinking of a way to convince her parents to buy her a new toy. ''Koneko, please follow him secretly. Find out everything about him and keep an eye on the fallen angel, too. She could try to make him join their side.'' Said girl nodded and went of to tail her senpai, with a stack of sweets in her arms.

(...Hyoudou residence...)

The ouroboros dragon was in the kitchen snooping around the shelves to find some sweets. She was tiptoing on a chair, until she heard the frontdoor. ''I'm hom-'' He was interrupted by a blackhead tackling him in the stomach. ''Ise, welcome home.'' The girl rubbed her cheeks on him. 'There is only one reason Ophis-chan would be so affectionate.' He took the bag beside his school bag and gave it to the dragon. ''Here, I brought you new sweets.'' It was a ritual that Issei would bring cookies or donats back home, when she already ate everything. ''I, love Ise. Ise is the best.'' He was unsure about the statement, because her expression didn't change and her attention was fully on the bag. ''Alright, let's go into my room and play a bit.'' Ophis halted in her tracks and turned around. ''W-what's wrong, Ophis-chan?''

''The last time, you were so nice, was when the shinto sun hogged you, for a whole weekend.'' She stared at him. ''A-ah I was invited to a date, so I won't be here sunday.'' The dragon walked off, with a pout. ''Please wait Ophis-chan! Why are you angry?'' She turned around with a sullen face. ''I'm not angry.''

''Ophis-chan!'' That night, the ouroboros dragon god sleeped in her room for the first time in seven years.