Whoa.

I was not expecting so much support for this fic. I mean, with how dark it is already, and how this is essentially just the tip of the iceberg, I was expecting some people to call for me to just close this fic up.

Guess not.

Idly, Ichika laid on his bed staring at the ceiling.

Cuddling next to him was Chifuyu.

With how possessive his sister was over him, he wasn't surprised.

He just wished that she would show some love as well.

The lesson had gone simple enough. During the whole time, his sister had blocked from him any access to the outside world. Despite how depraved Chifuyu could be, she knew when to actually detach her emotions from her work.

However, as soon as the lesson was over,she had returned to her yanderic nature. Were it not for the soundproof walls, a few curious girls might have been killed for their curiosity.

'It's a pity that nee-san hasn't found her significant other yet,' he thought obliviously. 'I'm sure that a woman as beautiful and strong as she is could get anyone that she wanted.'

"Oi, brat," she muttered into his ear with her eyes closed. "Thinking something stupid again?"

"No, nee-san."

Chifuyu noticed his depressed tone and sat up, the covers falling off to reveal that she wore a loose shirt and no pants while she slept.

"Okay, spill it. What the hell is troubling you?"

Ichika said nothing but looked down. Even after all those times he saw his sister naked, he was still incredibly flustered at seeing her face, much less her body.

"For hell's sake, Ichika, look at my face." Although the command was in a demanding tone, there was a slight tone of concern, too slight for him to pick up.

As the duo stared into each others eyes, Ichika felt himself slowly drawn in until ...

*Whack!*

As soon as he was under an inch away, she had whacked the back of his head. The sheer force of the attack knocked him out and sending his limp head unceremoniously falling onto her chest.

"You nitwit," she muttered with a faint blush on her face as she unceremoniously dumped his body away from her. "Don't do stupid things like that."

Despite her demented love towards her brother, she would still become embarrassed and delighted whenever she found herself met with his affections. A pity that she herself did not know how to return them properly.

She scribbled a note and left it at his side before walking out, having dressed ridiculously fast. She made sure to lock the door completely, in order to prevent anyone from reaching her brother.

Suddenly her phone rang. Eyeing it dubiously, she picked up. "What is it?"

"Hi-hi, Chi-chan!"

Of course it had to be the rabbit.

"Tabane, I swear to whatever Kami is out there that if there isn't a reason for this call, I will terminate any connections to you."

"Hnngh! Chi-chan is so mean!" cried the voice on the other side before turning serious. "Actually, I wanted to discuss something with you."

"What?"

The voice turned to a silky tone. "I want to cash in that favor. Now."

"You were serious?" asked Chifuyu with a small sense of dread.

"Of course, Chi-chan. Since when do I forget my promises?"

"Can't we discuss this some other time, Tabane? I ha-"

"Chi-chan, if you do not agree to this, as stated by our contract, I will increase the duration of the process. And you brought this upon yourself anyways."

Chifuyu made a pained look that clearly stated that she wanted to argue, but she sighed in the end.

"J ... Just make it quick," she muttered, bitter and weak-willed.

A laugh rang out on the other side.

"Quick? Oh no, Chi-chan. I promise to make the most I have out of an hour.

"After all, I can't have Ikkun forgetting about his Tabane-nee, hmm?"

When Ichika woke up, he found himself in an empty room staring at the ceiling.

'So nee-san left me alone again,' he thought with a depressed tone. He sat up before getting dressed.

"Ara ara, Ikkun is becoming a man."

Ichika spun around and say Tabane. "Tabane-nee?! How did you get here?"

Tabane shrugged. "I cashed in a favor. Now ..." She snapped her finger and suddenly a force field appeared surround the two with a decent amount of room between them. "No one can disturb us."

Ichika found himself backing up slowly as she slowly approached him. He felt as though he was trapped by a predator who had cut off any place to run and had cornered him.

"Why are you running away, Ikkun? Don't you want to spend some time with your Tabane-nee?"

Before he realized it, Tabane had suddenly appeared in front of him, her left hand caressing his face. he looked away, refusing to meet her gaze.

"Ikkun is so delicious, it makes me want to eat you up ..."

Tabane slid a hand inside of Ichika's shirt and proceed to move down but she stopped when she felt something. She lifted his head until they made eye contact.

"Did Chi-chan and Madocchi give you those scars?" she asked quietly. Not trusting his voice, he nodded slightly.

Sighing, she moved away before sitting down on his bed and patting a seat beside her.

"Come on, Ikkun, tell your Tabane-nee what happened.

After hearing Ichika's dilemma, Tabane frowned.

Besides the fact that the Orimura sisters prevented Ichika from ever meeting Houki, there was another issue.

This ... obsession ... of theirs. It wasn't healthy, to say the least.

After all, from all the animes she watched, a yandere always ended up with some thing going very wrong.

Aside from that, however, there was the issue that Ichika wasn't developing properly and the abused childhood did nothing to make his social life any less awkward.

"Ikkun," Tabane began. "I need you to answer these next few questions honestly, 'kay? Chi-chan and Madocchi basically rape you every single day."

"W-Well, I wouldn-"

"Ikkun. Honest. Answers."

"... Yes," he whispered, not daring to peer into the eyes of the mad scientist.

"See?" she beamed, patting his cheek. "That wasn't hard was it? Next question.

"Did anyone else do this to you?"

"..."

Although Ichika did not answer, the panicked look in his eyes and the way he unconsciously jerked slightly gave Tabane all the info she needed.

She sighed. "Ikkun, it isn't healthy to keep this bottled up. Why don't you tell anybody?"

Ichika gave her a blank stare before she caught onto what he meant.

After all, they were in a gynocracy. He would always be at a severe disadvantage when pressing charges against females. However, ther was also another reason for his silence.

Bad enough was the fact that he was used by his sisters as such. In fact, he might be taken into custody and the sisters sent to a correctional facility. Sure, the family might have been torn apart, but at least it would have been over.

However, had he openly admitted that other women would rape him, there was no guarantee that they would be safe from the yanderic madness of his sisters.

Tabane checked the time. She had a few more minutes before the contract was fulfilled, and she was sure that Chifuyu was going to barrage in there with an expression of "do-or-die."

"Anyways Ikkun," she said with a smile, burying his head into her chest. "If you ever need anything, just let your Tabane-nee know, 'kay 'kay?"

When she noticed that Ichika hadn't replied, she removed him from her and found that he had fallen asleep, weary from last night as well as the interrogation.

"Sheesh, Chi-chan, you really went all out last night if he can't even stay awake.

Soon after, Chifuyu immediately barreled into the room with eight blades in her hands. "Get. Out. Now."

The fact that Tabane had Ichika in her arms really didn't help her case.

Tabane looked at her with mild interest. "Oh? Chi-chan, I never expected you to be a master of the Holy Eight Blades style."

"That is irrelevant. Now get out." Chifuyu growled, slowly marching her way forward while dexterously weaving the blades around.

"You know, Chi-chan, that style is for people or machines with at least 6 appendages as well as IS machines. I can't help but question if you are even human anymore."

"Your hour expired fifteen seconds ago, Tabane. GET. OUT."

Glancing at the clock, Tabane smirked. "Oh, Chi-chan. You know that I still have fifty seconds left.

Noticing that Chufuyu was absolutely furious, however, Tabane decided not to push it any farther. However, that didn't stop her from giving Ichika a deep kiss on the forehead.

She heard a loud smash behind her, thanking her self from two minutes ago for erecting this shield should Chifuyu ever go beserk.

She didn't let up until an alarm beeped to signify her time was up.

"Oh, pooh," she pouted but left the room promptly, Chifuyu's blades still ceaselessly smashing against the barrier. 'You know, Chi-chan, your blades wil break if you keep this up." Seeing that Tabane had left the room, Chifuyu stopped her assault but stood between her and the room.

Before Tabane could comment on her possessiveness, however, she was grabbed by someone from behind, who promptly smashed her head against a wall.

"Wow, Tabane," stated Madoka with an empty look in her eyes. "You really want to die, don't you?"

Madoka tossed Tabane into the air before grabbing a random blade from the side and impaling Tabane with it.

Thankfully, Madoka wasn't seeking to kill, only to warn. She impaled the thigh, which was painful but Tabane would recover form it soon enough.

A few teachers walked into the hallway but after seeing Chifuyu with numerous blades, Madoka impaling a woman in a dress out of Alice in Wonderland, and the blood on the walls, they beat a hasty retreat so as to not get caught up in the conflict.

Madoka chucked Tabane across the hall before walking into the room.

"I'll warn you now, Tabane," she said ominously. "Aside from nee-san, I will not tolerate anyone prying into our familial affairs, understand?"

"Yes, Madocchi." With that, Tabane teleported to wherever her research lab was.

Madoka scowled before moving over to Ichika's side.

"Wake up, you idiot," she growled before slapping his head.

Ichika groggily got up. "Madoka-nee?"

Madoka rolled her eyes. "Of course it's me. Who else looks like nee-san but is slightly shorter than her?"

Not bothering with waiting for an answer, she immediately began wiping his forehead.

"Um, nee-san? What are you doing?"

"Getting rid of that stupid rabbit's taint on you. Now hold still, or else I'll punish you even more after this."

"Um, Orimura-sensei?"

Chifuyu glanced up from her paperwork and saw Maya. "What is it, Maya?"

"W-Well, I haven't seen Orimura-kun in a while and I wanted to ask .. is there something wrong going with him?"

"There is nothing wrong with his education. I ensured it myself."

"W-Well that's true, b-but what about his social life?"

Chifuyu finally out down her paperwork and gave Maya a wintry glare.

"My otouto has no need for such waste of time, Maya."

"Well, either way ..don't you have a meeting with the UN to attend?"

Chifuyu blinked before a demonic scowl graced her face.

"Of course I have to deal with those idiots," she muttered. "But Ichika's education ...

"Maya, I am giving you this one chance. Just take care of Orimura-kun while I'm gone, and that'll be the end of it. However, if I hear anything that is remotely against your case ... it will take more than the UN to find your body, understand me?"

Maya gulped before nodding. "H-Hai." With that, Chifuyu left, muttering about how many different ways she could dismember the UN members.

Maya gathered up her material before walking up to the private room where Chifuyu taught Ichika. Taking a deep breath, she walked inside.

As she forgot to knock, Ichika was not informed of her arrival. Although Madoka had already left, he had barely gotten dressed, clad only in his pants.

He was startled to see Maya in front of him. "Miss Yamada! I'm sorry, please let me prepare the room for you!"

However, this prompted no reaction from Maya, whose stare was fixed vividly on his body.

Under normal circumstances, she might have become beet red before fantasizing about doing lewd things with ichika but what she saw immediately overrode her thought process.

'So many scars ...'