LEMON ADDED DUE TO REQUESTS, PMS AND SUCH!

A/N: Hello! I'm glad I have people who enjoy my story, so I will see this one to the end, no matter what. :D though, I still can't come up with anything good for my other story. I know my writing style has changed a lot, but I feel like I've gotten so much better after throwing away so many chapters I thought were good. Nevertheless, we continue to Shido and Kotori's scenario.

AGAIN, THERE IS A LEMON. IF YOU FIND THE NEXT BOLD TEXT, READ IT CAREFULLY.

After helping everyone get tucked in and get to sleep, his day was finally over. It's over. Over and over again this phrase reappeared in his mind and he relished every moment of it. He walks towards his room to notice a sleeping Kurumi on his bed.

God. Damnit. I hate this. I hate this so, so much. I...

Shido stared at her position. Closely. Intensely. She was on her side, facing the opposite direction of him. Not so bad, right?

Wrong.

Her black panties and garter were in full view, and Shido gulped. What should he do, he wondered? His experience with Yoshino... pales in comparison to this..

I mean, he never really considered Kurumi anything except a psycho. Murdering people over the silliest things. Although that had been months ago, he still felt that same ominous feeling whenever he was around her.

...but god, was she gorgeous.

She's like a viper, a vicious snake. You get too close, she'll bite, but if you remain at a safe distance and do absolutely nothing, it'll be fine.

Suddenly, Kotori opened the door, "Shido?"

He turned around in a jolt of surprise, "Y-Yeah, uh, um, yeah?" He held up his hands and gulped.

Now, why the hell would you do such a thing? He put down his hands, his fingers rubbing his temples as an exasperating sigh escaped his body.

"Um.. are you... okay, Shido?" Kotori had a questioning look on her face, and Shido had hoped that the darling sister didn't have any irrational assumptions floating around in that weird little brain of hers'.

"Y-Yeah, I'm... yeah, I'm fine, but why are you in here?" Kotori then looked down and blushed, only after showing him a faint look of shock.

"Well, I... well, I..." she wiggled a little bit. "You were sleeping on the couch for so long, I thought you were asleep, so..." Now it was Shido's turn to look suspecting. Had she gone on any further, she would have revealed her intentions.

"And?... you were planning to fondle me in my sleep or something?" Kotori looked up with an angered expression and a huge blush spread across her cheeks. "No, you jerk! Dummy, dummy, stupid-" She was cut short as Shido pushed her into his closet and shut the door as he heard Reine asking for Kotori, knocking. The only reason he did this is because he was caught by surprise, but still... who would knock at this hour?

'How cliche and redundant. oh, let me just push my sister into my closet with me because someone knocked on the door. WHY the HELL did I think that was supposed to be something you'd do late at night for no good reason?' Kotori moaned faintly as his leg pushed against her lower, lower torso. He quickly tried to pull his leg away a bit, but noticed that it only results in his knee jamming into her soft spot, and on reflex he covered her mouth, to which she immediately tried to let out a loud moan.

This is bad. This, this is bad. So, so bad. What is he supposed to do, now? Burst the closet door open so Reine can see that they were inside a compact closet together? There would be so many obvious assumptions but very few imprecise conclusions that would come out of that, so he decided to remain put.

With his hands still covering his sister's face, he quietly spoke. "I'm sorry... I, just stay quiet for me- us, okay? Reine will think that we did something... sexual, in here." He looked down, looked back up, blushed and gulped. "Although, she.. wouldn't be wrong, and you have to agree, but this really wasn't my intention, I just acted on reflex to put us in here, and I didn't mean to rub my knee against-" She covered his mouth and nodded in understanding, but her blush never decided to fade away, making her seem like a liar.

Shido let out a small sigh of relief, and let go of his sister's face. She let out a big, quiet breath and stared him down. For minutes, they sat like that, until Reine finally decided to leave.

Shido swore she could have heard her mutter something like "lock" or "block", but whatever it meant to him, this meant that they could finally escape this weird situation. What a scenario. Doing sexual things to your sister.

Well, what it actually meant was that Reine had Tohka put a spell of some sort on the closet door, pushing him away forcefully anytime anybody tried to put a certain amount of force.

Shido giggled. "You have got to be joking me, right now..." She turned to her, and finally, his eyes adjusted to the light in the closet that Kotori turned on. Thankfully, it was a door to a closet, rather than see-through panels, meaning Kurumi won't wake up. "This is so embarrassing. Will you hurry up and open the door?" She said, her voice tainted with reluctance.

Shido gulped. "Well, you see, about that..." He moved to the other corner, so they didn't feel so claustrophobic. "Someone put a spell on the door." Kotori looked confused. "So?" He sighed. "It pushes me away every time I try to open it. We're stuck in here."

Kotori paled. "I wonder why she locked us in here though." Shido pondered, oblivious to her reaction. "I mean, there's no reason to lock a boy and a girl in a.." He slowly looked up to look at her face, coming to a realization.

"Okay, now I've done weird things, like kissing a little girl, but this is way too much." Shido tried to open it again, but he was repelled.

"Shido..." said girl looked up at him. "What are we going to do?" After she regained her composure, that's what she asked.

Said boy replied "I don't know..." suddenly, the thought of kissing her popped into his head, to which he immediately flared red.

'Weird, I didn't try to push the thoughts away like I did earlier... was Kotori's game meant to turn me into a sexual beast? No, of course not, it was to save the spirits. A good cause, but that doesn't mean this cause isn't capable of corrupting someone like me, and me especially. Reine had to have known this, so she probably wanted to test how far I would actually go on a girl, but the catch is, is that it's my sister. Meaning that this wasn't just a test. This was to see the effect of the cause and how it damaged me.'

After that conclusion, he felt awesome, like a detective. He feel like he hit the bulls eye, the hammer on the nail, the arrow in the middle, the bullet in the head.

And then he realized it wasn't so awesome. He knew that this was her plan, but to not consider how this would affect their relationship after tonight was a little crude. At least put some thought into something like this before setting it in motion, you damn brute.

"Ano, Kotori-chan..." He looked down at her, their bodies pressed together because of the density of the room.

"You know," He sighed. "It's nice that everyone is asleep. I can finally get a break." Kotori blinked. "What do you mean, Shido?"

"Well," He began, "All these dates just put too much strain on my body and exhaust me to the point of passing out."

She nodded with an "Mm." and continued. "I can understand, and I'm honestly sorry about putting you through all this, but you have to understand that you're the only person in the entire world with the sealing power that you have." He nodded, and after a few moments, she started to feel uneasy. After a few more moments, she started to look uneasy.

He raised an eyebrow questioningly. "Are you okay? You're fidgeting around and you seem unsettled, Kotori." She jumped slightly, as if she just got yelled at. "Well, I..." She sighed.

"You know... you remember what you said, when you sealed my powers?"

Shido then looked at her, into her eyes. "Huh?" He adopted a puzzled look. "I said a lot of things. What in specific?"

Kotori flared up red. "Do you always have to be so stupid and mean?" She beckoned.

Shido was still puzzled as all hell. "What do you mean? I don't.." She hit him on the shoulder.

"Stop being stupid..." Kotori said quietly, "When you said you loved me."

At this point, he didn't know what to think. So, here's his list. Tohka, Yoshino, and now his own little sister? This is nuts. Out of control. And he thought his morals couldn't ever be more broken then they were after his kiss with Yoshino.

"Y-Yeah?... wh-what about it?..." There was no response. Just an expression hidden by her cute red hair as she looked at her feet, and a white Shido. Shock.

"Well... did you.. mean that?" She asked, and upon receiving the answer she expected, she sighed. Shido laughed. "Of course I did. I love you." She blushed more.

"I mean..." She coughed. "Did you.. really, really mean that?..."

Now Shido understood what was going on. Was his little sister trying to confess to him? This feeling was even stronger than it was with Yoshino. He couldn't battle it. He is too weak and defenseless over it this time, it would seem.

"Kotori..." He grabbed her shoulders and stared her point blank in the eyes. "I love you more than anything in this entire world." And that sentence was filled with truth. He hadn't realized it, because, of course, it'd be weird to just say 'I love you more than anything' to your sibling, but where Shido stands at this point in time, what has he got to lose?

"Onii...-chan..." She looked into his eyes, her white ribbons making all the red she is themed in look fine. He just now took note that the white ribbons actually look better than the black ones.

"So..." He coughed nervously. "How do you feel?" Kotori's defense broke. "What?" Kotori asks fake confusion. Shido was going to reply, but he felt he should wait.

"I..." Kotori looked at him, nervous. They sat in silence for minutes on end, leaving Shido wondering if this entire night was a good one. "...I really love you.. ever since I can remember."

Shido broke out into a blush, but she continued. "You always treated me as the thing that was most important to you, even when we were growing up. You'd fend off all the bad guys and keep me safe. You would always tell me you love me and hug me, and we would always cause mischief and eat ice cream. You would always protect me from the monsters under my bed and in the closet. I know we don't have much recollection of our past together, but I love every single one that I can remember... we did so much together.." Shido was lost beyond words at this, but even so, she continues. "I can't stress how important you are to me, onii-chan... you're pretty much the only person I ever cared about and will ever care about..." She leaned in, to look deeper into him. "I..."

"I just... I just can't see myself being with anyone but you, Shido."

Okay, now Shido had remembered how hard it was to control his lust when he kissed Tohka, and when he kissed Yoshino, but this... had spiraled into something so crazy that 'out-of-control' would be an understatement.

"I'm sorry.." He began. "I know you probably feel really bad when I seal spirits' powers, but... I do it to save them.." He blushed. "I'll admit, I do have feelings for all the spirits I saved, which probably makes me look weak, but..." He held a hand on her face and smiled.

"The love I have for you, Kotori, is just as strong, if not more." And in that moment, there wasn't a better time for them to kiss.

But before they did, he took a moment to realize the extent of the gravity of what he had just said. Had he really meant it, or was it in the heat of the moment? His bulge was, well.. bulging, and his heart was pumping faster than he had ever felt it pump before. His brain said no, but his heart, his unruly, unmoral-bound heart said yes. Just do it. There's nothing that could go wrong, Shido. Just a boy and a girl, seemingly in love. A taboo love, but, love.

That they did. Shido felt her gentle lips upon his, and she let out a sigh of relief, a sigh of acceptance. Shido slowly slithered his tongue into her mouth, and they began the tongue-war. His hands began to caress her back as he gripped her tighter, and her hands slithered through his arms and onto his back, clenching his shirt and moaning. Relentlessly, his tongue wrapped around her's and their bodies began to heat up as they continued this forbidden act. Kotori shed a tear and had a smile on the corner of her mouth. Neither of them could believe this, but with this, their relationship was going to be a lot better from here on out.

His hand sunk into the back of her head and the other wrapped around her, his hand ending up in her waist. Kotori's hands simply clenched his shoulders, as she felt her knees and legs would give in, as if she were holding on for dear life.

Never had they experienced something like this. It turned him on, to be honest. Something so looked down upon was happening, and their hearts and brains were the catalysts. It turned her on just as much. It wasn't until then that he had began to unbutton her shirt and she moaned quietly.

"Oniiiiii..." She breathed out heavily, as she pushed her back against the wall, a gesture for him to continue. "You love me, right?.."

Shido bit his lip, the feeling of swallowing an apple rendered him unable to respond for a moment, making him look hesitant.

"You know this..." He kissed her gently, to which she let another tear escape her. "..I really love you." And now he knew he meant it. His head began to pound as the reality of what he was going to do with her set in, but he shoved it off.

"Then, please..." She continued as he unbuttoned the last button on her shirt, revealing her white bra. "..show me you love me."

And with that, began the actual forbidden love.

====If you don't like lemons, skip to the next bold text. If you do, continue reading as normal. ^u^====

Shido gulped at what he saw, his sister's bare breasts. He felt himself begin to heat up in multiple places, something he had never thought he'd experience in his lifetime, something on the bottom of his list, mostly because he didn't care too much for stuff like this.

And, no less, the person he ended up doing it with is his sister. His own sister. Shido hated to admit it sometimes, but he really felt amazed at what love could do to you.

Or, rather, how dumb you could be. Shido had spent a few seconds debating whether he was doing this because he was an idiot, horny, in love, a combination of either three, or all of the above.

Kotori breathed out puffs of air, and beads of sweat raced down their bodies as they stared into each-other's eyes.

"Kotori..." He placed his mouth on her left mound, and she moaned quietly. "O-Onii.." She breathed out, already feeling as if she could explode at another act of indecency. Her body began to heat up more than before, and Shido's rod slowly hardened.

He swirled his tongue around that cute little nub on her chest, which made her even more soaked than she was with each swirl. He really thought it was kind of cute. Though, sure, he was more scared than he had ever been in his lifetime whilst doing stuff like this to his sister, but what should he do, really? Back out, now?

'No.' He thought, squeezing her chest, emitting another cute moan from the red-head. 'No turning back after this point. There could have been a point, but..' He couldn't think straight. He felt this sense of unease settle in, as if his primal instincts were kicking in.

What kind of instincts though, he thought, as he licked his sister more and more? Shido didn't have time to give a damn, as she felt her slender fingers push against his bulge. He looked up at her and she looked down to him. "Onii... Cha-chan..."

"Y-Yeah?" He swallowed the saliva that had gathered around her pettanko chest. He felt dizzy for a moment. Shido took another moment to let this all sink in.

Okay... so, he was about to do this with his own sister...

...though, he didn't care anymore. His morals were already gone after kissing a little girl, and that much he knew. So, what was there to lose?

Nothing, he thought. And, there was much to gain. Oh, much to gain. Just imagine... Kotori, never has she done 'it' before... He shuddered at the thought, but then quickly snapped back to reality.

'Holy... shit...' He thought. 'I'm turning into a sex-crazed maniac! Oh, this is...' He felt her lips on his, and he subconsciously kissed her back.

'So... so, so bad...' And with that, she unbuttoned his shirt as they began another heated make-out session, her hair ties falling off, his hair turning ruffled, and their faces hotter than 110 degrees Fahrenheit, or something like that.

After they pulled away, he noticed that his half-exposed body lie before her's. She began to swallow saliva. "You're... really cute, onii..." He blushed, and then chuckled, about to say something out-of-character and bold.

"You're one to talk." She quirked her eyebrows, panting. "Huh?"

That wasn't the bold thing I was mentioning.

"You just let me suck on your chest, and you have the nerve to call me handsome?" She fumed red, and looked down, covering her chest.

'Yeah,' He thought. 'That's it, act innocent and violated and uneasy... and... my, oh my god... I... am really turning into a maniac...'

"Onii-chan... I..." Kotori stared into his sapphire blue eyes with her ruby red eyes. Their eyes glistening in lust, she unzipped his pants and pulled his jeans down, revealing a giant stick covered by another thin layer of cotton.

"Can't... wait anymore..." She pulled down his undergarments before he could protest. She grabbed a hold of his meat as he flinched and groaned in surprise. "K-Kotori, wait!" He offered, but she pushed on, and licked the head.

"I'm so happy.. to do this with you..." He was fuming red like her at this point, but she still pressed on! "You... always told me... sex is saved for... someone you love, right?"

He nodded carefully, and, respectively, she shoved his entire rod into her mouth. Said blue haired man gasped in surprise, paralyzed by the amazing, freezing cold wet sensation that soon engulfed every fiber of his being.

A part of him he didn't know existed had begun to take over, as he just press his back against the wall and let her do her work.

Kotori's head bobbed back and forth on his member, nearly twice as wet as she was minutes ago, the sticky, salty liquid slowly rolled down her thighs, calfs, feet, and finally the floor. Kotori's left hand reached her holy gates, while her right was stroking his rod whilst sucking on it.

Shido, at this point, lost all sense of rationality. This growing beast inside of his heart had finally taken over. He jammed his pelvis into her throat, her eyes widened as far as humanly possible in shock, and held her breath as he forced her to swallow his seed with a rather abrupt groan.

"A-Ahh... shit..." His face twisted in a satisfied look as Kotori nearly had an orgasm from his orgasm. Ironic, she thought, but she wanted to continue indefinitely.

"Onii-chan..." She gulped the rest as said onii-chan looked down at her in surprise. "K-Kotori, I'm sorry, I don't know what got a hold of me, I!-" She got up to her feet, bringing his hands to her underwear line. "Pull them off..."

Shido obliged subconsciously, but still looked at her in shock. "Onii-chan..." She began. "I-I... can't wait any more..." Something clicked inside onii-chan's head as he shoved her onto the wall and got on his knees.

"As forbidden as this may be, Kotori-chan," He said as he spread her open with two fingers, her most sweet spot available for him to peer into. "I love you dearly." And stuffed his tongue inside, prepared to scream "ITADAKIMASU!" For the feast she had presented to him.

"Y-Hyan, O-Onii!-" She gasped yet again as she felt her super special spot being stroke perfectly with every punch his tongue threw at her. "O-Oh, oh..." She moaned silently into the closet as she felt him hit her special spot once more.

"Wh-What a-Ahn!-weird place to-to... do this!" She whined as he felt a finger enter her, his tongue still doing it's repetitive activities.

Shido, on the offhand, was going insane. He wanted to ravage her body, not eat her. His rod was twitching with ache and an itch that he can honestly say could only be satisfied by doing it with her.

She held her mouth as she held back a scream, as much as she could, as she had a giant orgasm. He eagerly drank her juice, partially to return the favor of what he forced her to do. Not that any guilt was on his head, I mean, he feels guilty about this kind of thing between family, yet...

"Kotori.." He breathed, her love-juice sliding down corners of his mouth as he breathlessly panted. "...I love you, so, so much... dearly, I do.." She slapped him gently and told him to shut up, and that he's an idiot.

"What's with the sudden change of attitude?" he asked, still happy.

"..." Came her deafening silence. "...You said that enough already.." She looked up at him as they stood up. "I love you too, you idiot! Now, please..." She looked away as she opened her shaky legs.

"Show me that you really, really love me." And with that, he achingly lifted up one of her legs, and pressed his head against her entrance. She looked down at their half-connection, highly concerned about the pain.

"Kotori-chan, I've seen and heard about this..." He coughed. "It's my first time, so..." Kotori blushed like mad, almost the same tone of color as her hair and eyes.

"I've never done this with anyone else, Shido-onii... only you... I only love you..." He couldn't bear to listen to her adorable phrases any more, so at once, he shoved every inch of his length into her, breaking her hymen and emitting a small shriek of pain from her.

"You trust me, right?" He said, Kotori's left leg over his shoulder as they stood in place. She nodded carefully. "Well, from now on, it will start to go from painful to good, according to Reine." She nearly choked on her breath, even as they stood, genitals locked in place.

"And why would she say such a vulgar thing?" He chuckled at her response.

"Well, at any rate, why do you care?" That being said, she blushed and was about to protest, until he interrupts her. "We're already having sex, Kotori." Again, before she could yell at him for saying such a dirty phrase, he pulled out, and roughly slammed himself back into his little sister, emitted a small yelp of pain, and a new emotion.

"Kami..." He breathed. "It's... so much better than..." Pump, pump, pump, he pumped his shaft in and out of her slowly and thoroughly, sure to savor every bump of her walls. "...what we ever did together..." After a minute, she began to fall into a state of hazed Ecstasy, and if this was a manga, her irises would be heart-shaped.

"Ah-Ah-Ah!" every pump emitted a cute squeal that begged him to do it faster, harder, more roughly, even.

"O-nii-cha-a-a-a-n~~" She let out an elongated moan as Shido pounded into Kotori's genitalia. Shido grabbed the back of her head, forcing their foreheads to touch, as their eyes locked while he slammed into her.

"I love you... I love you, I love you, I love you..." Kotori repeated non-stop as her mind was clouded with the craziest, wildest stimulant to ever have been received, along with Shido.

"I love you too, Kotori.. my beloved little sister." And of course, even now, as he was committing this vile act, he didn't lose his sanity. Through all of this, he learned how to control his lust. He turned his lust into his love for his little sister, and so, he pounded into said little sister with a merciless intention, and did not once look away from her eyes. He felt engaged in the most powerful sensation he had ever felt, one stronger than rubbing body parts together. Love. Now he had understand what it truly meant to love. Earlier, he had forced his sister to drink his orgasm, a crazed, wild, untamed beast, ready to demolish his sister. And now, he stands with a purpose, and this purpose was to make her happy. For now, all he wanted was to see her smile. He would not stop until Kotori was satisfied to the point where she simply couldn't hold out for any longer.

At long last, a loud scream was heard as his hand quickly covered her mouth, his rod blowing everything he saved for the last 30 minutes as he was pushing into her. "O-on..." She couldn't form a single word as she felt her stomach warm up with another new sensation: fertilization.

"You... Onii..." He rubbed her cheek with his hands as he pulled her into a gentle kiss. She felt yet a-no-ther new sensation. She now felt love. This was a lover's kiss indeed, she thought, as she gently kissed back, his member going limp.

====Here lies the end of Shido and Kotori's scenario. R.I.P., hardest work of mine. XD 3====

"You.. did it inside?" He looked rather embarrassed when she put it that way. "I couldn't help it... I just wanted to see you happy..." Kotori blushed purely out of embarrassment, and of course a sense of 'ohmygosh he's so adorable!'.

"I love you, Shido." She said truly, purely. Though he knew 'pure' wasn't exactly a fitting word for the act these two siblings had done, he didn't care what anyone, nor any omnipotent beings thought.

"I love you so much more, Kotori." He then passed out on the spot from over-exertion.

She blinked, and for a minute, bursted out laughing. Truly, this was a night to be remembered, as she felt her vision fade, lying next to him as they passed into their dreamscapes.

UPDATED A/N: Welp, there you have it! I tried kind of hard on this, so if you have a problem, constructively point out anything you didn't like about this, and I'll make 110% sure to note it for future fictions, and/or improvement for future fictions. Thanks for reading my most dedicated writing! Damn, that's a lot of words for a single chapter, hehe. Regardless, enjoy. 3