Hey guys! I'm back! Quite early too. This chapter will probs be short, since I am in secret writing this in class. We are doing a project, which I am done with but if I write this they think I'm still writing so yea.

*The difference between male and female tails is that the female's is usually longer and has more fur on the end. The reason tails are the weakest are because they are connected to the spine by only two muscles and a very thin bone. When pressed on, the bone sends a warning mechanism through the spine and ribs, causing lots of pain. (I made this up, but who knows it might be true)

** Waspadai bekas luka dengan kuasa api yang mematikan = Heal the scar with the power of the deady flames, in Malay. I will use this language to do Sin's chants n such. 

ALSO I MANAGED TO CUT MY ELBOW A BIT BY ACCIDENT AND IT WONT STOP BLEEDING IT HAS BEEN BLEEDING FOR LIKE TWO HOURS HELP WHAT AM I GOING TO DO!?!??!?! HEEEEEEEEEEEEEELPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!

Anyways- HERE WE GO! INTO DA CHAPTER!

Everyone in class laughed at the comment Shima made. Except for Bon. He was really mad at Sin now. "You are so going to pay.." He pulled up his sleeves. Yukio didn't say anything: He wanted to see what would happen. "You do know I am serous about burning your stick, right?", Sin threatened. Bon however, didn't care. He walked up to her, looking down at her (he is like twenty cm longer so ye). Sin smirked. Then she punched him in the balls. Then she grabbed him and pulled him to his seat. After that she just sat down on her original place besides Rin. Yukio coughed and continued the lesson, obviously not wanting to annoy her more. 

"As I said, a demon has it's tail as a weak spot. They have different places that hurts more then the others. The base or the tip usually hurts the most. Would one of you be nice to tell them more about your tails?", Yukio asked looking at the two demons. "Like, how to care for it, or what?", Sin asked. "Yes, how to care for it and what happens if you dip it in Holy Water.", Yukio answered. "So you are going to take one of our tails and dip it in Holy Water? That's so mean..", Sin whispered the last part. "What was that?" Deciding what to do in like two seconds, she then shook her head. "Nothing. I can do it.", she said. The class let out a 'Ooooohh' sound, while Rin just stared at her mouthing 'Are you serious?!'. She stood up and started telling them about how to care for the tail, the difference between male and female tails and why the tail is the weakest spot*. 

"Now where's the Holy Water? I wanna get this done with. Also can I skip class for the rest of the day because I'm doing this? I wouldn't be able to attend anyways.", she said when she was done with the explaining. Yukio nodded. He brought the bucket of Holy Water. It smelled sweet, but that was only to attract demons. Gulping, Sin lowered her tail. She then quickly dipped it making smoke rise from the bucket making her let out a scream of pain, then run to dip it in the ice cold water Yukio had prepared. She took the bucket with her to her place and held her tail in it for a moment. Then she raised it. The students gasped. In stead of her slick groomed fur, the tail had turned blue and looked like a birds nest. Her fur was messy, sticking everywhere. The hot smoke above it were still coming from it and tufts of fur were missing. Out of curiosity Rin touched it. Almost immediately he pulled away his finger. Her tail was burning hot. Sin lowered it in the cold water again and raised it, letting out a moan of pain. 

Her fur was completely destroyed, messy, clumps of fur here and there, tangles, heck it had even lost enough so you could see the actual tail at some spots. Everyone gasped once again. Rin carefully sniffed it, then immediately leaned away from it while exclaiming: "That thing smells wet dog!" Sin glared at him, then brought it for inspection. She then looked at Yukio. "So why did one of us have to do this? You could just use one of the demons we have at the school. This might take a month to fix." Even thought Sin knew it would only take about two weeks, she was mad. She had the prettiest, longest and most cared for tail in the whole world. At least that's what she believed. Not anymore though. Now Rin had a prettier tail than her. 

Rin poked her tail again. Sin buried her head in the table. "To be honest I didn't think you would do it. I just sent it as a dare. What do you want as an apology?", Yukio sighed. "I want to be able to care for Rin's tail while mine regrows it's fur. He can't object. I will also have full access to the library, because for some reason I'm not allowed in there.", Sin said. Yukio sighed. Rin was shaking his head, not liking the deal. "Well then. Deal. Now you can go cool it down, because I can tell from here that it got burnt." Sin let out a thanks, then walked out of the classroom with her tail in the ice-water bucket she held in her hand.

---:o:---

"Riiin! Rin! Hey! What are you doing? It's time to shower our tails. Remember?" Sin stood outside Rin's room, banging on the door. She heard a groan and the door opened. This time Rin had brought clothes with him. "You wont be able to wash my tail today, so you either have to stick with that or do my back or something. I don't care.", she said. Rin nodded and walked with the other demon to the showers. As Sin turned on the water she let out a yelp of pain as it reached her tail. It had stopped glowing blue, but still hurt as hell. 

She placed it under the bench, since that was the place which would give the most cover from the water. Feeling the warm water sip through her hair and down onto the body, she sighed. "Man I didn't know your brother was that evil. He seemed like such a nice guy..", she said to Rin. Rin nodded, feeling a bit of the same feelings. 

"Guys, can I join in? The shower is empty without you, Rin.", a voice said from behind. Rin and Sin face palmed. "Ugh sureeee...", Sin growled. She sat down besides Rin, pushing him to the shower at the edge so he was all her own. Yukio walked into the shower room, joining them. He sat at one of the showers besides Sin. "So Yukio, why didn't you tell me you were just joking? This will take forever to fix!", she said lifting her tail. A water drop hit it and she hissed in pain, pulling her tail away. "I wanted to see if you were joking and then I wanted to see if there was any different for half breeds. Which it weren't.." Sin pouted. "By the way, what made you think that you could come here and shower with us in the girls shower? Especially since you are sitting naked next to me, a naked girl." When She spoke Yukio's eyes widened more and more. He realized what he just had said and turned away, choosing a shower a bit away. 

Sin let out a chuckle while Rin just kept showering, obviously he hadn't listened. Sin grasped his tail and began working on it, while he did his hair. When she was done she did her own tail. Well, tried to anyways. As soon as she touched it it felt like the whole tail burned, sending the same feeling to her spine. She decided not to wash it and simply grabbed her towel to dry herself. When she had put on her clothes, she leaned against the wall in the changing room. Her tail was hurting, she was tired, she was hungry, she was on her period and to make things worse she had lots of homework. She let out a groan. Rin walked into the changing room, drying him self and putting on clothes. 

"What's with the groan? It's not that bad, right?", he stupidly said. Sin stared at him. "Not that bad huh? Not that bad? NOT THAT BAD? WELL YOU WANNA KNOW SOMETHING? THIS SHIT SUCKS!", she snapped at Rin, who backed down a little. "I AM HUNGRY, MY TAIL HURTS MAKING MY WHOLE SPINE HURT, I AM HUNGRY, TIRED, HAVE A LOT OF HOMEWORK AND I AM ON MY PERIOD. YOU KNOW NOTHING!" Sin glared at Rin, panting out of her outburst. Rin had backed against a wall. Sin then took a deep breath and left the room. "What is going on in there?", Yukio asked from the showers. 

---:o:---

As soon as Sin reached her room she slammed the door closed and fell into the bed. She didn't cry, weirdly enough. After a while of staring into her pillow and cursing, there was a knock on the door. She snapped at the person to leave. "I have food? I cooked it for you.", the person outside the door snapped. "Come in..", Sin groaned. Rin walked inside holding a plate of food. He had cooked a stew, which smelled really good. He had brought two plates and sets of cutlery, obviously planning to eat with her. She sighed and sat up, looking at the food. Looks really good.

She motioned for Rin to sit besides her. She then grabbed a plate, fork and knife. The glass of water stood still on the tray which Rin had put on her desk. She grabbed the spoon and put some of the stew on her plate. She took her fork and put on of the pieces of meat on it. Rin watched carefully, waiting to see what she would think. As she ate the piece, her eyes widened a little. Rin however didn't see the small change. "Well?", he asked when Sin swallowed. "It tastes..", Sin began. Rin got a bit worried at her dark tone.

"AWESOME!", Sin exclaimed. Rin let out his kept in breath and grabbed some to eat too. "Sorry for that. After the dip in Holy Water I've been in a really bad mood.", Sin said while eating. Rin nodded in understanding. He ate up his portion and was about to take another when he realized there was nothing less. He looked questioning to his left. Sin had filled her whole plate, stuffing herself with the last of the stew. She really was that hungry, huh?

After the food Sin thanked Rin for both the food and cheering her up. He replied with his normal 'Its nothing'. They sat and talked about random things, liking each others' company. After a while, or well some hours, Yukio knocked at the door. "Guys it's 9 PM. Go to sleep." He heard two groans, but the door opened. Rin and Sin walked out with their empty plates on the tray which Sin was holding. Rin held both of their toothbrushes. Yukio wondered how he had gotten his own, but shook the thought away. As Sin and Rin brushed their teeth together, a thought struck them both. "SLEEPOVER!" they both exclaimed at the same time, before bursting out laughing and choking on toothpaste. When they were done, Rin went to get his pillow and blanket, while Sin prepared the other bed. 

When Rin returned to Sin's room she had put on a grey over sized t-shirt. Realizing he usually only slept in underwear, he quickly threw himself onto the bed on the other side of the room and pulled off his pants and shirt. The beds were about four to five meters apart, but that didn't stop them from talking until Rin eventually fell asleep. Sin giggled a bit as drooled in his sleep. She sighed. Since she has insomnia, she wouldn't find sleep that easily. Especially not keep it for longer than 2-3 hours. She waited for about half an hour, before she started her reading lamp. She had borrowed a book from the library, Yukio had given her a key to it. 

The name of the book read: 'The Story of Satan and his flames'. It was mostly used in cram school, but since there was two of Satan's children in their class they decided not to bring it up until later. As Sin began reading, Rin turned to the side in his sleep. He was having a nightmare. His tail twitched and put itself in the attack position: Curled up like a scorpion tail. He let out a soft growl in his sleep, grabbing Sin's attention. Sin continued reading, but she had directed her ear towards him. As she finished reading the first chapter, about how Satan supposedly achieved his power and might, Rin started whimpering in his sleep. 

  Sin put the book aside and walked up to him. She then moved him slightly to the side and laid down besides him. Sin began spooning the demon, wrapping her arms around him. She had spun her tail around him, except for the top of hers of course. As Rin whimpered again, she mumbled some words and closed her eyes. Darkness flooded over her for a second, then she was in one of the halls in cram school. The chant had worked. Sin had used a method Mephisto once had taught her. 

Sin walked towards Rin's smell, which was mixed with the smell of fear. Rising her pace, Sin strode through the corridor. She ended up outside their classroom, which she quietly sneaked into. Rin sat at his seat, surrounded by his classmates. "Demon!" "Creep!" "Monster!" "Murderer" Sin gasped at the dream. Is this how they have been treated him? How could she not have noticed? She walked up to the group. Yukio had joined them and was talking about how it was Rin's fault that some guy named Shiro was dead.

"Rin. Follow me.", Sin said. Rin's eyes widened as she grabbed his hand, reaching through a gap between Bon and Yukio. Rin stood up and followed Sin, or well, was dragged. He looked confused, scared, unsure and small. "This is just a dream Rin. A nightmare. Try to close your eyes and count to ten. Then open them.", she said when they had reached the corridor outside the classroom. Rin did as told and when he reached ten, everything turned black. The dream was over.

Sin woke up sweat running down her face. Rin twitched in his sleep, then opened his eyes. "S-sin?" Sin nodded. She sat up in the bed, their tail still entwined. "You were having a nightmare, so I came to take it away. I guess it worked?", She said. Rin nodded. "How were you in my dream?", he asked. Sin motioned towards their tails, while saying "It's a method Pheles told me. I used to live with him, you know?" Rin looked at her surprised. "Well, it's two AM. You better go back to sleep.", she added. Rin nodded drowsily. She lay down beside him, spooning him again. 

Their tails were still entwined. Sin began singing a lullaby, while caressing his hair. After a while he had dozed of. She was about to take her leave, but he had turned around and grabbed her in his sleep. She sighed and closed her eyes. However sleep wouldn't come. After a while she reached out to grab her book, which she had cleverly placed on the desk beside the bed. She used her left eye as a light, using her demon powers. As she reached chapter seven in the thick book, Rin stirred in his sleep. Sin looked at the wall clock and widened her eyes. She had been reading for over four hours, the clock was now half past six AM. 

She let out a soft yawn, even though she hadn't slept. Rin snuggled closer to her, beginning to wake up. Sin tangled her fingers into his hair. His tail was twitching a bit, making Sin's tail move too. She let out a soft breath. Rin finally opened his eyes. He let out a soft yawn, into Sin's chest. Sin chuckled. Rin suddenly realized how he had been sleeping, therefore immediately sitting up. He saw their tails and immediately brought his back to his own body. 

"Good morning, Rin.", Sin said. She put her book aside, standing up stretching. "How long were you awake..?", Rin asked. "Oh? I didn't sleep after removing your nightmare. Stayed up reading the whole night.", She said like it was nothing. Rin stared at her. Sin stared back. Although not into Rin's eyes. Rin followed her gaze, landing on his abs. He blushed and grabbed his shirt. "Haven't you seen that enough when doing my tail?", he asked flustered.

The two went up to eat breakfast, which Ukobach had made them. Thanking the little demon for the food, they grinned happily. Yukio was walking into the cafeteria when the pair walked outside. He stared after them. 1. Rin is awake. 2. Rin looks awake. 3. Rin is awake before me. Those thoughts went around his head for a while. He decided he would allow them to have sleepovers often, since it seemed to be good for Rin. Then he misinterpreted it and slammed his head into the table.

---:o:---  

When they got into the classroom Sin took the book out of her bag and began reading it. First Rin didn't care. Then he saw the title and looked over. Sin was reading a part about how to control the blue flames and how to use them for curing sicknesses. She paused in her book and put it aside, wanting to test something. She took a pair of scissors and cut herself, making a long scar along her arm. Rin let out a gasp making the others turn towards them. Sin was doing something, blue flames engulfing her body except for a arm which had blood running along a long cut on it. Sin's flames began to glow even more as she started chanting.

"Waspadai bekas luka dengan kuasa api yang mematikan!*" The flames poured into the wound. Five seconds later, they were gone and Sin's wound was healed. She sighed and continued reading. "Interesting", she had mumbled. Everyone else in class just stared at her. Yukio walked into the room, confused as to why everyone was staring weirdly at Sin. 

"Class, on this Friday me and the other teachers decided we would host a Halloween party!", he said earning all attention. "Rin, i'm leaving you in charge for the food. Sin, you and lets see... Shima, can do the decorations. I would like to see some nice torches here and there. You are allowed to use your flames.", he continued. The said teens looked up, saying 'Hai!'. "Bon, you and Shiemi will find a place to hold the party and seal it. We don't want demons to ruin it.". For some reason Yukio looked at Rin through slit eyes.

"Izumo, you and Konekumaru are in charge for buying what we need. Rin will follow you when getting ingredients. The ones left, will take care of invitations. I decided we would let you invite three people each.", he continued. Everyone nodded. Today was a Tuesday, so they had three days left. Sin raised her hand. "Can I borrow Kuro for something? I have an idea." Rin looked at her and let a nod, Yukio doing the same. "Also, I have an appointment with the principal soon. Can I take my leave? I'll be back by P.E." Yukio nodded and Sin stood up, making sure to grab her bag and book. She then left the classroom, where the others were doing some planning for Friday. 

"Oi! Mephisto! It's me, Sin.", Sin shouted as she got outside the principals room. The door opened and she stepped in. "You said you have something for my tail?", she said. Mephisto stood up from his chair and walked over. He inspected her tail, earning a hiss of pain. "Yes,I have it. Einz, zwei, drei!". Pink smoke came from his hand. When it disappeared he had something on it. It looked like some bottle. "It will hurt when I apply this though, I recommend laying down.", he added. Sin laid down on her stomach in the sofa. She held her tail high, twitching a bit as Mephisto's cold hands touched it. He wasn't wearing his gloves for once.

Sin heard a sound, guessing it was him opening the bottle. He put the gooey liquid on his hand. As soon as he started putting it on her tail, she began hissing in pain. Sin was doing all she could not to scream so even the students at the cram school would hear. Mephisto was almost done, only the tip left. He knew this was Sin's sensitive spot, so he did it as gently as possible. Sin had dug her face into the pillow, her whole body trembling. When Mephisto was done, he started chanting something. "Drahý otec, přeji si, abyste opravil jeden z vašich ocasů."

The pain got even worse as the liquid started melting into the tail. At a point Sin couldn't hold and let out a cry of pain. She kept cursing and twitching in the slow procedure of the liquid sinking in. When it was done her whole body was shaking. Mephisto made comforting strokes on her back, explaining that her tail would be back to normal by tomorrow. Sin nodded. After a while she walked back towards class. The P.E was about to start, so she didn't have time to change. Luckily she had decided to wear jean shorts and a t-shirt with just the uniform coat on.

Even though it was almost Halloween, the cram school students had P.E outside. Sin walked up to them. They were at the big grassy field, which were connected to one of their keys. Yukio had them today, since their real teacher was sick. "Today we are going to do a game. Think of it as a game of tag. There will be two, no three teams. You are supposed to take one of the colored bands and put them in their pants, like they are a tail. When the round starts your goals will be to have as many opponent tails as possible. When you get one you put it in with your team's tail. Everyone understand?", he explained. Everyone nodded. Sin and Rin got into one team. The other was Shima, Shiemi and the shady guy in the hood which name author always forgets. You know, the one who is actually Shura.

The other team was of Bon, Konekumaru and Izumo. The puppet guy wasn't allowed to compete, since he was apparently in the school orchestra at this time. The demons had blue bands, the S squad (i will call it dat) were green, and the last team were purple. Yukio had made sure everyone started about twenty meters apart. Sin had made sure both hers and Rin's real tails were tucked in, impossible to grab by accident. They put on their bands. Everyone was done, so Sin started counting down. Yukio let it roll, and watched as everyone readied themselves. 

"Eight, seven, six, five, four, three, two, one!", At one, Sin shot up a blue flame in the sky. Everyone began running. Sin and Rin ran side by side, Rin behind his half-sister. They had already decided to go for the S squad last. The purple team were their targets. The team had split up, Bon and Konekumaru together while Izumo were attacking S squad. 

Rin and sine had caught up to Bon and Konekumaru, they were now five meters apart. Sin smirked as Bon charged for her. She jumped to the side when he reached her, grabbing his tail. Since he had no other tail, he was out. Konekumaru seemed to have been Rin's target, because he too was out. Izumo were left now. She had managed to take Shiemi's tail, making her a harder target since she had two lives now. Sin and Rin's eyes met each other. They nodded. Yukio noticed this and immediately began focusing more on the pair. Sin had actually taught him a bit about how to use telepathy. He was not really good at speaking back yet, but he could hear it. The two changed direction, aiming for Shima. He immediately saw this, but since he was really close to getting Izumo's tail he didn't change direction. 

"Rin, you go to more to the right. Hoard them towards the edge of the field to the right", Sin telepathically said. Rin let out a swift nod and turned to the side. He had made sure to look behind him now and then and looked safe enough. Sin sped up, making Shima panic. He looked like he was about to flee, but then he saw Rin and realized he had to keep running Izumo's way. Izumo already noticed this. She knew that unless the others in the S squad came and attacked the demons she would loose. Sin reached Izumo and took his tail. She ran past him, putting on her third tail. He looked at her in surprise and felt with his hands to make sure his band was lost. 

"I'll help you corner her. You take the purple. The green tail is mine!", Sin said to Rin, still in telepathy. He said a soft 'Sure' and started quickening. Sin looked behind her, where the other member of the S squad was. She was running quick, soon going to capture them. "Changed plans. You go for both, I need to get this one!" Sin made a quick turn, meeting the gaze of the shadowy figure. Sin had quickly sped up even more. She knew that whoever that was would be powerful, so she made sure to be cautious. The cloaked female did not show any sign of slowing down or tiring. She had her gaze on the approaching demon.

"Oi, Yukio. Am I allowed to use my tail for this?", Sin shrieked. "I thought it was damaged? But if you wanna risk it, sure. No powers though.", Yukio answered. Sin nodded. She brought her real tail out, letting it sway freely behind her. As she and the other female got closer to each other both came to a stop. Sin was letting out a low growl from the bottom of her throat. The females began circling each other. Rin had managed to get Shima's tail. He was running towards the girls. "Oi, Rin. You can get closer but don't jump in 'till I say so, okay?", Sin sent to her friend. He answered with a nod, the two had locked eyes when speaking. 

Shura (I am gonna call her dat cuz i have forgotten what the students call her. So ye) looked at the two, knowing they had communicated. She'd seen it in their eyes and the way they move totally synced. She tightened the circle. There was about one and a half meter between the girls. Sin growled even more, baring her fangs. The others who were out were watching along with Yukio. Although the bands on Shura's waist was one target, Sin aimed for something else. She jumped forward, snarling. Her arms were extended and she looked like a cat lunging for Shura's face. She got thrown aside, but quickly got up on four. Rin had reached the fight and was standing a bit behind the cloaked girl. 

"You start attacking when I start snarling." Rin positioned himself, ready to start running. Shura was about to start running when Sin started arching her back. She acted like a fearsome cat. Sin even held her tail like cats did when angry or intimidated. She snarled and started clawing herself forward, moving swiftly even on four. Her tail was whipping angrily behind her. When she jumped again towards Shura, Rin was behind her. He managed to trip her, Sin landing onto her. Then the cloaked figure grabbed Sin's tail, the real one. Sin yelped in pain, not expecting it. At the same time the figure grabbed all of her three tails before kicking the demon off. Sin snarled at her before angrily walking off. Everyone 'OOh'ed when Sin had been defeated. Rin also got defeated easily, having no teammate to back him down. 

"Nice job! Class dismissed, don't forget to leave the bands here! Sin I want to talk to you.", Yukio said. Sin let out a groan, knowing she was up to a scolding for behaving how she had done. She walked up to him, whipping her tail angrily. "Can you explain your behavior?", Yukio asked. "I did what I did only to try to scare her off. I knew that most people fight worse when nervous. I tend to try to be more scary when I feel threatened too. I felt threatened because I knew she was stronger then me.", Sin explained. She was about to walk of when Yukio cut her of. "I have TWO more questions. First, what did Pheles say?" Sin groaned and explained how he had given her an ointment for her tail. Yukio nodded in understanding

"Second question: Did you and Rin communicate somehow and how?" Sin had guessed he would notice, but not that he would ask. "You have to know?", she said clearly annoyed. Yukio nodded. "I taught him a bit telepathy. He can only do it with me though, since I am the only one he has tangled tails with. So? Is that enough. I wont explain what 'tangled tails' means. Ask Pheles.", Sin sighed. She then walked of. Yukio dialed Pheles number, clearly wanting to know.

"Oh, she has tangled tails with him? That's really good. It means they have strengthened their bonds and are ready to mate.", Pheles said when Yukio asked the question. Yukio immediately questioned what Pheles said. "Well, it would be good since I want to know what happens if two half demons with the blue flames mate and have a kid.", Pheles said. Yukio immediately shut the phone. 

---:o:---

Mephisto sat in his office, happy to know that the two demons already were ready to mate. He had made a deal with the Vatican, so they would allow the demons to mate. Since they too were curious of what to happen, they allowed it. They also made sure that if the two would bring up a demon kid with the flames, they would have to train it to be a demon. Mephisto grinned happily, imagining what the pairs kid would look like if they had one. A knock came on the wooden door. Mephisto's grin widened even more.

Sin walked in. "You asked me to come?"

Want lemon? COMMENT ON THIS SENTENCE!

Yay! Cliffhanger kinda? Anyways, this has slightly over 5.2 K words. I'm proud of it, except for the fact that I'm to lazy to google up what Shura's Cram School nickname was. Meh. Anyways, CYA NEXT CHAPTER M8!