Hey guys, Deeplblue here with another story!

First chapter has elements of non con but this story will gradually become more wholesome in the future

I don't own IS or it's characters

Ichika swallowed nervously as he looked down at the dishes in the sink. He could feel the dark stare of Chifuyu's eyes burning into him, sending shivers down his back despite the warm water washing over his hands. His sister sat on a wooden chair, eyes looking at him with the intensity of the sun. And Ichika was scared.

His older sibling eyed him impatiently, hands rubbing up and down her t-shirt and black shorts as she gazed at his body, mouth opening slowly and licking her lips as she got ready to pounce on him.

Nervously, Ichika finished the last cup and put it on the rack for drying. This would be the last moment when he was safe tonight, his sister wouldn't touch him while he did chores. He wrung out the dishcloth, slowly, perhaps a little too slow. Though Ichika wanted to stay here, to delay longer, he was worried that if he pushed his luck then Chifuyu would break their unspoken agreement, and Ichika would have no place where he was safe.

As soon as he took a step back, his older sibling started to move. Before Ichika could even fully turn around, she was next to him, gripping his shoulder.

She grabbed the back of his head, forcing him into a kiss. Ichika could feel her tongue sticking down his throat as she pressed his whole body against her. There was nothing he could do, she was much too strong for him. Chifuyu moved her other hand down his back, grabbing his left buttock and squeezing hard.

He shifted his bodyweight onto his right leg. He had to, as the hand groping his left buttock had already rendered it incapable of taking on any weight. She continued to press her lips against his, her eyes closed. Ichika's body began to shake, though his head and leg were locked in place by her overwhelming strength.

Abruptly she pulled back, releasing him from the kiss as beads of saliva hung between them. She again fixed him with her stare, though Ichika had long since become too scared to look her in they eye.

She grabbed his wrist and begun to move, leaving Ichika to hobble along behind her or else wind up being dragged. He followed her along up the stairs to his room, tripping as his sister pulled him impatiently. As perhaps his only act of defiance against Chifuyu, Ichika had removed a small table that used to be at the top of the landing, to stop himself from hitting the sharp wooden corners.

They reached the top of the stairs and started down the hallway, passing by Ichika's room and into Chifuyu's. The lights were turned off, the windows were covered with thick black drapes, and the door closed suddenly behind him, leaving Ichika blind in the near complete darkness.

Of course, his older sister's hands found him effortlessly, pinning him against the wall as she pushed herself in for another kiss. Her hands moved up his body, groping him, running through his hair, and feeling Ichika's skin. She began to strip him, taking off his shirt as the Ichika complied. The boy knew she would simply rip off his clothes if he resisted.

Now Ichika was naked except for his socks, his back cold against the wall of her room as Chifuyu ran her hands down his torso, sliding down to his manhood and touching it gently. Her hand pulled away and Ichika could hear his sister taking off her own clothes, removing the shorts and top she had been wearing. Finding Ichika, -who hadn't tried to leave, she moved in for the part that he hated the most.

She pressed her head softly against Ichika's chest, listening to his heartbeat. This drove the boy mad. He knew she was about to violate him completely, he just didn't know when. At any moment, be it within the next ten seconds or thirty minutes from now, Chifuyu would move as if snapping out of a trance, pushing him down onto the bed whereupon she would force him to have sex with her. But for now, she was motionless, leaving him alone in the darkness and too afraid to move.

Ichika gritted his teeth, this was driving him insane. His heart started beating faster. His erection started growing, pressing against her thigh. Ichika remembered the countless nights they had spent in here, the feel of her body against his, of her hands exploring his body, the times she had force-fed him viagra when he wouldn't get an erection. Ichika wondered if Chifuyu still loved him, if she still thought of him as her brother. He still loved Chifuru deeply, and cared for her despite her constant sexual assault, but there was only so much abuse he could take.

After a couple more minutes she finally moved, wrenching Ichika forward and pressing him on the bed. He could feel Chifuyu on top of him, her hair running over her body and onto his chest. The older Orimura slipped off her bra and underwear, tossing them aside.

More kissing came, as Chifuyu pressed against his lips while closing in with her body, -hands laying on the side of his head as her forearms rested on his shoulders. Her breathing became louder as one hand slid under Ichika's head, now pulling him forward as she moved herself onto his lap. Ichika was made to lean upright as she stroked his hair, he could just barely make out the outline of her body in the darkness.

He moved away, recoiling as far into the mattress as he could go and shielding his face with his hands. He shifted his body, trying to move his manhood to where it wasn't pressed against her body. Chifuyu began to stroke him down there, leaning forward and pressing her breasts against him. Already Ichika could feel his body reacting to her attack, as his manhood began to stiffen.

In a desperate attempt to stop the inevitable and not to be merely a prisoner of his sister, Ichika worked up the courage to move a single arm. Before his resistance could even begin, she invaded his lips with his tongue, but his arm came to rest on her head, stopping her movements in an instant.

Was she curious as to what he would do? His older sister was still pressed against him, still holding his penis, but otherwise motionless. Slowly he began to pet Chifuyu, allowing himself for a moment to feel safe. But just when he was able to catch his breath, his sibling ignited into action once more.

Whatever small delusion of power he had was shattered as she took control, pressing him against the mattress with just one hand on his chest, as she positioned him at her entrance with the other. Without delay Chifuyu eased down onto him, making her brother gasp as she began to move with her body, slowly at first, then faster and faster.

"Chi-Chifuyu Nee!" He called out, eyes closing as he fought to keep himself under control. He found himself covering his face with his hands, his cheeks feeling hot as they came into contact with his wrists and forearms.

His older sister bent over him as she thrust down onto his manhood. She grabbed his shoulders tightly, digging in with the nails as if marking her prey. Ichika was dimly aware of her figure hovering over him, of her hand pulling away briefly to move the hair out of her face before returning to her grip on his arms. Right now all his mind was overwhelmed by the nerves firing off from the center of his tip as she did him from above.

There was no way for him to tell how she felt, what she was thinking right now. Ichika didn't have her perfectly honed senses even if unobstructed by the sensory overload he was experiencing. His obliviousness and general confusion about the other gender didn't help.

He couldn't escape what he felt. Chifuyu's body closed tightly around him, her walls were soft and warm, and wet enough to avoid either's parts gettting hurt despite the speed at which she moved. Time seemed to stretch out for ages as his brain began thinking in overtime, filling his conciousness with every spot that his body touched her. The feeling of her legs rolling over his hips as she moved up and down. The light touch of her hair on his skin. The dull ache coming from his shoulders as she gripped him tightly.

He was bleeding now, his cut arms staining the mattress as Chifuyu's nails moved further up his body, finding a new place to dig in, to hold him in place while she raped him. Ichika started gasping, struggling to relax his body and clear his mind. Calm down dammit, I need to loosen my body before it snaps. His legs wouldn't move. His back wouldn't stop arching up ever so slightly. His fists clenched and uncleched rapidly, otherwise lying helpless in place. Panic began to set in as he realised he had no control over his body. Whether it was the constant conditioning and sex she had forced on him, the fear of her anger, or his subconcious enjoying this hellish sex too much despite the pain, Ichika was paralyzed.

At last his sister had had enough, yelling his name as she arced her back, tightening around him. When she was finished, she slowly got off of him, until Ichika could feel only her breath. Then, slowly, Chifuyu ran her fingers through his hair, moving her hand down his body until she reached the small cuts she inflicted on him, at which Ichika recoiled slightly. He could feel her knuckles and hand kneading the bloodied mattress next to him, and sense the outline of her face looking down at him, at the small cuts and nicks she'd inflicted on him.

Then Ichika felt tears dropping down at him as his sister began to cry. The once firm hands were now trembling as small droplets of water descended onto his face and neck. She made no attempt to hide her vulnerability now, sobbing softly at first before bawling her eyes out and hugging him tightly. Ichika didn't move, his hands now resting softly on the bed.

"I-Ichika." She cried. "I'm so sorry."

"Onee-chan." He whimpered. His throat felt dry and his body was sore. He told her he loved her, of all his feelings of pain and guilt. Of the fear she instilled in him when she raped him. Throughout all of this, his sister was silent.

"Chifuyu, p-please. Do whatever you want with me." He rasped. "But please, don't stop talking to me. You're the only one I have. You're the only one that can help me."

Eventually, Chifuyu fell asleep in his arms, her chest slowly rising and falling against him. For a moment he allowed himself to hold her, allowed himself to pretend for just a moment that everything was okay. Then, slowly, he lowered her down into bed, resting his head on her shoulder and curling up next to her while he pulled a blanket over them. Exhaustion overcame him as he fell asleep. When Ichika woke up next morning the door was opened slightly, enough to let a little light in. And Chifuyu was gone, leaving him alone on her bed.

This had repeated for months now, the cycle unbroken except on the nights when his sister was on a mission. He had tried everything he could will himself to do; words, fighting back, even running away. Nothing had stopped Chifuyu from preying on him every night. Perhaps Ichika could have tried harder, or done something better, but he had no experience with this and no one to turn to. He had all but resigned himself to this life.

Little does Ichika know what is about to happen. Tomorrow he will awaken an Infinite Stratos and his world will change again.

_

Damn Ichika that's one strong woman!