Are 'Friends' Electric, Chapter: Extra (Ui x Yui)

She eyed it darkly, glowering at the the newest addition to her sister's life. It wasn't just a guitar, not to Ui, it was the first step that would take her sister away from her.

"It's not fair..." she muttered, holding the knife in both hands and swaying gently in front of the exposed Les Paul sitting vertically on a stand. "She already spends more time at school now... and she spends time at night practicing with you" she said, seemingly addressing the guitar. "She's spending my time..."

"Big Sis is all mine!" she growled, poking the point of the knife at the guitar. Ui's dark eyes were glazed, and she giggled as she rested her cheek against her left hand. Ui's right hand guided the knife's tip to the strings, and she let it slide down, dragging a ghastly squeal from the metal as the blade slid along them.

"Ui, are you in here," Yui called from the hallway as she came in, "I thought I heard..." She stopped short when she saw Ui, knife in hand, slowly cast her head back and to the side, looking at Yui over her shoulder with icy eyes.

Ui's singsong voice felt sinister in the dim room. "Big sis! You're home." She tapped the edge of the kitchen knife against the head of the guitar. "I bet your ears are burning... we were just talking about you."

Yui trembled a bit, but came into the room. She's seen her sister like this before; something dark came over her. She knew Ui loved her, and she loved Ui, but sometimes that wasn't enough.

It wasn't Ui's fault, their parents spent so much time away from home that Ui wound up taking care of her most of the time, sacrificing her own life and happiness. Shame tightened Yui's breath, 'If only I wasn't so useless,' she thought, 'Ui wouldn't have had to work so hard for me...'

"Ui," Yui began softly, "Are you all right?"

"Fine, fine, big sis," Ui said, her voice soft and lilting with an unnatural quality. "I was just saying, though, You've been spending a lot of time at school and at home working for the club. With HIM," she spat, jabbing the knife toward Yui's guitar.

"Yes," Yui said as she watched the knife's blade waving as Ui spoke. "It's important for me to practice, I promised them I'd do my best."

"What about family," Ui said quietly, clutching the knife in trembling hands. "What about what you owe us... what you promised us.. promised me?"

"Promised you?" Yui asked, stalling for time as she inched closer to Ui.

"You PROMISED!" Ui shouted, brandishing the knife. "The very first time Mom and Dad left on a trip, you promised me... promised me..." she sputtered, breaking down into tears.

Yui remembered, it was the first time she saw Ui cry even if she was younger than Yui herself was. It was right before Christmas, and their parents were going out on a cruise. Their aunt was going to come sit for them, and they promised to be back on Christmas eve, but it was still a shock for the sisters... it felt like their first Christmas without their parents.

"I remember," Yui said softly as she crept alongside Ui. "I promised you that, no matter what, I'd never leave you."

"Then why did you leave!" Ui shouted, clenching her hands into angry fists at her sides. "You left me behind in middle school to go to High School. You left me behind and made new friends. You left me behind in the house... all alone... All because of that music club," she said angrily, glaring at the guitar in the corner.

Yui and Ui lunged forward at the same time, and Ui tried to gouge a chunk from the side of the guitar before her sister could snatch it away. Except, Yui didn't try to grab the guitar, she grabbed the knife instead.

Ui rounded on her sister, but froze as soon as she saw how Yui was holding her, one hand on her own, the other wrapped around the blade of the knife. "L- Let go, big sis!" Ui half demanded, half pleaded, "You're going to hurt yourself."

"Not until you listen." Yui said, determinedly.

"Just let me go!" Ui said trying to free the knife, but not wanting to yank it out of her sisters grasp, "Let me destroy this thing and then we'll be together again!"

"Ui stop it," Yui said, more strongly than Ui could remember her speaking to her before. She looked up at her sister's eyes, but Yui wasn't angry, she was crying.

"B- Big sis?"

"I'm sorry, Ui," Yui said, "I'm sorry you felt this way. I promised we'd be together, and we will be... we ARE," she said squeezing Ui's hand, "But we've both got out own lives. Things we want to do, people who care about?"

"But... but Big Sis," Ui said, the sinister facade cracking as tears slowly slid down her cheeks "I don't want to lose you! I'll be all alone without you... if you're taken away from me, I don't know what I'd do."

Yui smiled, "You're not going to lose me. You've met the other people in the club, haven't you? You know they're good people, they're my friends, and I care about them," She said, "But, I love you Ui," she said emphatically, making her sister look up into her eyes as she smiled, "I love you Ui. I won't leave you or forget about you. No matter what I do, I won't forget about you."

"B- B- Big Sis," Ui stuttered softly, trembling. Crying earnestly now, the tension in Ui's arms began to falter, and Yui let go as the younger girl's arms went slack, falling down to her sides. "I'm sorry, Big sis," she whimpered.

She gasped as Yui seized her in a fierce hug, holding her close and rubbing her hair. "I'm sorry you felt alone, Ui," she said, holding her sister. "I'm sorry you felt alone."

"Big sis," Ui sobbed softly into her sisters shoulder. "Big Sis, Big Sis..." over and over she cried into Yui's shoulder, slowly hugging her sister back.

"Ui, it's ok.. It's all ok..." her sister soothed, gently stroking Ui's hair.

The tone of Ui's voice began to change as she hugged her sister tighter, becoming a litany of a deeper want. Her lips teased Yui's neck as she whispered "Big Sis," again and again clinging so closely to Yui that the older girl was having trouble breathing; breaking her sister out of these fugues always seemed to convert her jealousy to passion.

"Ui..." she said, trying to hold off her younger sister, "We don't have to do this..."

"Don't... don't you want to?" Ui questioned, her eyes glittering with tears. "Don't I do it right?"

"No... I mean, it feels good," Yui said, blushing as she remember their last night together, "But we're sisters... It's wrong, isn't it? I don't want you to do something that's going to hurt you..."

"Big Sis..." Ui smiled, her eyes radiating sweet lust and deep love, "I want to do this, because I love you. More than anyone else, I want you to love me too."

"Ui..." Yui began, but was cut off as her younger sister sprang up on her tiptoes and seized a brilliantly passionate kiss. Yui's resistance slowly melted and she leaned forward into her sister's kiss, twinning her tongue with Ui's. She suppressed a shudder as she felt the flat of the knife, still in Ui's hand, slide across her back as Ui caressed her.

Ui pressed herself into her sister, guiding her back to the bed where Yui struck the side, loosing her balance and falling backward. Ui crawled onto her sister, cradling her face tenderly as she kissed her sister more deeply.

Yui's hands wavered momentarily before finally moving to Ui's waist, gently holding her hips as she returned her sister's affection. Flashes of dim light out of the corner of her eye distracted her, and she broke off the kiss to see that the knife was still in Ui's hand.

"Hey, Ui..." Yui said softly, "Isn't that a little dangerous?"

"What, Big Sis?" Ui said innocently. Yui wasn't sure if she was joking or not.

"The, uh... the knife," Yui prompted. "It's a little scary."

"Why?" Ui said, a little petulantly, "Don't you trust me?"

"O- Of course," Yui answered a little hesitantly, "But don't you keep telling me that playing around with those is dangerous..."

"That's because you're a little clumsy, Big Sis," Ui replied with a soft laugh, "But I'm very, very careful with them. I can use them very well," she continued, with a troubling gleam behind her eyes. "Would you like to see?"

"Uh... I..." Yui said, nervously watching the flickering light crisscross the blade.

"You don't trust me, do you," Ui said, tears starting to well in the corners of her eyes, "You can't think I'd hurt you! I.. I..."

Yui swallowed heavily, putting on as big a smile as she could despite her faint trembling, "Of course I trust you. I know you would never hurt me intentionally... G- Go a- ahead..."

Ui sniffed once, but smiled and nodded. She straddled her sister's leg, leaning over her with the knife. Light glinted keenly from the tempered edge as Ui stroked her sister's forehead gently.

An unsettling dimness settled over Ui's eyes, and she seized Yui's hair, making her cry out as Ui pressed the flat of the blade to her sister's cheek. Yui whimpered softly, but didn't struggle as Ui slid the cold polished steel along her cheek, lifting it till only the point rested against her skin. Ever so gently, Ui slid the point, spine first, along the taut hollow of Yui's throat as she clenched her jaw to keep from crying out.

"See," Ui said softly, the tip grazing the soft skin along Yui's throat, "I'm very good with knives, I've been using them for a long time to cook for you... "

"I see," Yui said hoarsely, "I believe you, Ui... you can put it down now."

Ui leaned close to Yui's ear, whispering "But we're not done yet, Big Sis."

The tip of the knife dipped lower, sliding into the gap between her throat and the blue tie at the neck of her uniform top. Ui slowly twisted the knife, winding the ribbon tighter. Yui held her breath as her tie tightened around her throat, gasping reflexively when the cotton band gave out, cut through by the hard ground edge.

"Big sis," Ui groused, pouting, "You're still so nervous."

"I- I'm sorry, Ui," Yui said, "I can't help it... but," She said, looking her younger sister in the eyes, "I do trust you... "

"Big Sis," Ui smiled, unconsciously grinding against her sister. She slid the blade lower, edge down this time, to the first button on her sister's uniform blazer. A deft flick of her wrist severed the threads holding it in place, and she scooped it up on the flat of the knife. "Just like coring a tomato..." she grinned, flicking the brass button over her shoulder to clatter in the corner of the room.

Yui watched as her sister cut away the remaining two buttons, one at a time, laying her blazer open. Yui could feel the flat of the steel blade tapping against her outer thigh as Ui continued to stare longingly into her sister's eyes. The older girl felt the spine of the blade sliding along her leg up to the V of her crotch as Ui worked it in a figure eight against her mound.

Yui blushed, flush with a mix of adrenaline and arousal as Ui turned the knife, sliding the cold steel of the blade under her uniform top flush against her belly. She shivered at the cold intrusion followed by a short, startled cry as Ui flicked the blade upward, shearing through the cotton top of her uniform with one quick, savage stroke.

Yui continued to tremble, even as the shock wore off, as she found herself lain open to her sister, left with only a plain cotton bra with a tiny pink bow. The knife was pressed against her belly again as Ui slowly worked the flat of the blade upward toward her sister's breasts.

"You're still shaking, Big Sis," Ui said, toying with the knife. She would give it a serpentine curve upward slowly before flipping the blade over it's spine to the other side, pressing the blade in a second swoop in the opposite direction.

"I c- c- can't help it...." Yui stammered, "M-my body is t- t- t- trembling all on it's own."

Ui slid the blade of the knife between the soft skin of her breasts and the brassier, right under the bow. "You're heart is trembling too," Ui said with a soft lilt, bobbing the satin bow up and down in time with her thrumming heart.

Sliding the blade out, Ui began to trace small circles around one of Yui's nipples, the tip of the knife scraping just barely audibly in over the soft fabric. Yui whimpered softly as the nub stiffened, barely becoming visible under the fabric. Yui clenched her fists at her side, straining to hold herself still despite her fear.

"Ah, ah..." Ui said, scraping the tip of the blade across the crossover in the bra to the other side, "If you keep shaking like this, you might hurt yourself." Yui shivered from head to foot, but said nothing as her sister stroked the tip across her other nipple, her breath catching softly in her throat with each deft flick.

Ui changed her grip on knife, the blade stretching downward from her clenched fist. She stroked her sisters erect nipple through the cotton patch of her bra with her first two fingers as she smiled.

"You're still scared," she said. A statement, not a question.

"Yes," Yui whimpered softly.

"But you're not fighting me?"

Yui just shook her head as Ui pinched her nipple between her finger and thumb, tugging gently and make her gasp. "Then you get a reward," Ui said, her eyes twinkling sinisterly, "For trusting me..."

She traced the delicate line of her older sister's ribs down the flat of her belly, her fingertips dancing along her ribs as the cold, metal blade slithered just ahead, it's tip dipping below the band of her skirt and panties, lying cold against her hip. Ui grinned, grinding herself against her sisters leg as she slowly twisted the blade, the finely honed steel ripping through her sisters skirt and panties with the calculated hiss of a coiled snake.

Ui giggled. "Reminds me of filleting a bluefin," she said, laying open the plaid skirt and panties and exposing her sister's sex. Running her fingers through the downy hair covering Yui's mound, Ui caught her sister's gaze and smiled. Turning her hand over, she curled her fingers and stroked them up Yui's slit, making her sister moan despite herself. "What's this," Ui said, working her fingers in a 'V' as juice schlicked between them. "You're this horny already?"

"N- no!" Yui insisted, flushing bright red, "You were t- t- teasing me... I can't help it..."

"Really," Ui said, spreading the folds of Yui's pussy with her fingers, watching a few, thin droplets of her juice run out, "Even though you were scared of me?"

Yui lifted her hands, hesitantly. Slowly she brought them up and gently held her sister's face. "I was scared of the knife, Ui," She said, "Never you."

Ui blushed sheepishly, "Big Sis," she whispered, stroking Yui's pussy with her fingers, "I love you Big Sis."

"I love you too, Ui," Yui replied, gently cupping her sister's face. She hissed as Ui began to stroke the hilt of the knife gingerly against the folds of her sex. Ui was careful, stroking it gently against Yui until it was well slicked with her juice.

"It's ok, Ui," Yui said, lifting her hips slightly to stroke herself against the wooden handle. "It's ok..."

"Big Sis," Ui breathed as she slowly slid the hilt home into her sister's sheath, making Yui bite her lower lip and moan. Her sister stroked Ui's face tenderly, her hips twitching as Yui became more accustomed to the intruding length of the handle.

Ui kept the knife handle still, the blade pinched in her fingers. She was careful to keep the spine against her hand and angle the blade away from her sister's thighs. Slowly she began to draw it out, the damp wood dark in the fading afternoon light of the room.

Yui squeezed her eyes tight, pulling her free leg aside to give Ui better access to her sex. Ui twisted the knife gently, swirling the hilt inside her sister before sliding it home a second time, burying it inside Yui again, her knuckles striking at the bottom of Ui's slit. She turned the knife again, sliding it out of Yui's clutching pussy as her sister mewed softly. Yui let go of her sister's face, fumbling behind her for the headboard.

Scrabbling for a handhold, she grabbed it in time to take the next thrust of the knife's handle, groaning in pleasure as her sister drove it home into her again. The smooth wood parted her supple folds with ease, and Yui thrust back against it almost without thinking.

Ui's pace quickened, and she grunted in time with her sister's moans as she thrust the handle into Yui's pussy. She felt an electric thrill run through her as she watched Yui's back arch, saw her hips buck to meet each thrust of Ui's hand. Yui's leg was slick with Ui's own juice as she humped herself against her lover's leg, matching each thrust of her own hips with a jab of the knife's grip.

Beads of sweat began to rise on Yui's face, each glittering like a tiny jewel over the flush of exertion as her passion built. The headboard creaked as she held it for each thrust, humping heavily against Ui's hand as best she could without dislodging her while the heady scent of sex swirling in the air.

"Ui," the older girl moaned, "Ui I think... I think I'm..."

"Me too, Big Sis," Yui whimpered, still grinding herself against Ui's shin. She drove the tempo higher, increasing the pace of own hip thrusts as well as each pistoning drive of the knife handle. "I want you to come with me, Big Sis!"

"Ui! Ui!" Yui chanted, moaning loudly as her climax drew nearer while her younger sister slammed home the hilt of the knife so hard the back of her hand slapped audibly against her sister's inner thigh.

Ui's own pleasure was breaking, and she crested the top of the rise of her passion, shouting "Big Sis, I love you~!" as she drove the hilt of the knife so deep it vanished completely within the folds of her sister's sex as Yui wailed her sister's name, spasming around the handle as rivulets of come ran from the edges of her pussy.

Ui gently slid the knife free from her sister's folds, and brought it up to her sister's face. "Stick out your tongue, " she said breathlessly, and Yui didn't hesitate. Ui slowly turned the knife until it was point down, and watched as droplets of her sister's cum gathered and slid down the edge before dripping off into her waiting mouth.

Ui collapsed against her sister, panting heavily her heart thundering in wild rhythm with Yui's. Yui slowly let go of the headboard, and wrapped her arms around her sister, embracing her as they recovered from their climax. Ui's hand wavered and finally let go of the knife, which clattered to the floor beside them. She gripped her sister wildly, embracing her as hard as she could, crying, as Yui gently stroked her hair.