I have a confession to do. Sometime, I read my previous chapters and I'm mad at myself. If English was my first language, this fanfiction would be better, I bother me to not be able to offer you a story well written.

What was the last time she had slept? How much hours? Or should it be counted by day? Midori couldn't know, she stayed too much time tied on a chair, with a headphone on her ears and blindfolded. She was not allowed to have some rest at all, she was private from any physical sensation or sleep. First, the headphone emitted a loud sound every ten minutes, to wake up the green haired girl if she fell asleep. Now, she had a electric collar around her neck that sent her a shock everytime she was about to fall asleep. It wasn't enough to kill her, but it was quite painful to be woken by a shock. Midori was forced to fell this torture many times per day, because the human body naturally fell asleep when someone stayed perfectly motionless for a long time.

Reiko was in front of her prisoner, enjoying the results of her torture. Midori was about to break and she knew it. To be private from physical sensation and sleep could easily make someone crazy. It was the purpose of this experiment, Reiko wanted to see how much time it would take to make Midori completely insane, and maybe died.

Suddenly, she pinched the green haired girl on her arm. Her reaction was instantaneous. Midori screamed like it was the most atrocious pain she could feel. It was just a pinch, but for someone who didn't fell anything for multiple days, it was comparable to a stake stabbing her arm. Midori began to cry, tears coming from her only valid eye and flowing on her cheek. The blindfold was now half soak. Satisfied by the reaction she caused to Midori, she smirked, before headed to the exit door.

"P-please, kill me!" began to beg Midori. "Kill me, I'm begging you, kill me…just fucking kill me!"

Reiko did exactly the same thing that Midori did when Otoya asked her to stop torturing her and killed her instead. The teacher ignored her and laughed, even if the green haired girl was unable to hear her and left the room, extremely pleased by Midori's supplications.

Shiena and Otoya were in front of a modest house. The brunette had a paper into her hand, with an address written on it. She was checking the address on the house's door.

"It's here" said Shiena. "It's the same address"

"So, want should we do?" asked Otoya. "Knock at the door? Or maybe entered by an open window…"

The brunette took out her gun and approached from the door, followed by her girlfriend.

"We'll see if the person is there, let's knock. I'm ready to welcome him or her" said Shiena.

When she arrived in front of the door, the brunette began to knock furiously at the door. The serial killer watched her, surprise to see Shiena so frustrated. Usually, when Shiena was furious, it was after her girlfriend. Otoya found her really sexy when she was angry. After a moment, the house's owner didn't answer.

"Seem likes nobody's home" said Shiena. "Too bad, we'll have to broke a window"

"Wait, Shiena! Maybe we could find an open or unlock window first…"

The brunette didn't listen and took a big rock, before smashing it into one of the windows' house. She couldn't care less for the owner's property, especially if it was this person's house.

"We don't have time to be worried for this person's property" said Shiena. "Now come with me, we don't have time to loose"

Shiena entered by the broken window, followed by the serial killer. They looked around them, before gazing each other. They checked on the first floor, searching for a clue about the owner's identity.

"Nothing" said the brunette. "I'll check on the second floor, you go check the basement"

Otoya obeyed to her girlfriend and went to the basement. She downs the stairs and arrived in front of a room. Curious, she opened the door. The serial killer could never guess what she would see in this room. She was her worst enemy, tied up on a chair, blindfolded with and headphone on her head.

"What the…Midori-chan!?"

The serial killer approached from the green haired girl, confused and curious about her current state.

"Midori-chan, why are you here?" asked Otoya.

No answer. Otoya understood that she could probably not hear her.

"She can hear me, or see me…this is sensory deprivation!" thought the serial killer, smirking. "I love this torture"

Otoya remembered the time she had convinced Shiena to add the sensory deprivation's concept into a sex game between them. This memory gave her some bad thoughts and intentions toward the green haired girl. She took out her scissor and approached the blade from Midori. She was so vulnerable right now, completely helpless, how Otoya could resist to the temptation?

"Just one cut, it's not like she didn't deserve it" thought the serial killer. "After all she had did to Shiena and me, she deserve more than just one cut!"

Suddenly, Otoya opened her scissor and slightly cut Midori on her thigh. The serial killer couldn't expect the green haired girl's reaction. Midori uttered a scream of pain and temporally collapsed. If only a pinch was awfully painful for her, than a cut what even worst. Since she technically fell asleep, the electric collar gave her a shock. Midori immediately woke up, heavily breathing and moaning from pain. The serial couldn't deny that she wasn't turned on by Midori's reaction. Otoya slightly touched the collar around her neck.

"Sleep deprivation too?" she thought. "The person who did this is cruel. Ah, if he or she wasn't Shiena's enemy, I could get along with this person!"

Otoya stroked Midori's green hair, before removing the headphone.

"D-dammit, you psychopath!" shouted Midori. "Kill me, enough of this torture, just kill me please!"

The serial killer remembered having said something similar when Midori had tortured her. She couldn't know if she was satisfied by Midori's misery of if she had pity of her current state. Otoya approached her scissor from her troat, envisaging killing her. But she suddenly changed her mind and grabbed the green haired girl's chin.

"Aren't you the one who said that death wasn't enough for murderers, than they need to suffer before dying?" asked Otoya.

"That voice…you aren't Kamikuro-san…who're you? Don't tell me that you're…"

Otoya removed the green haired girl's blindfold and gave her a serious gaze.

"Do you want me to kill you? Do you think that someone like you deserve a painless death? You're like me, you're a sadistic killer, so why shouldn't you deserve a painful death, like you wanted to do with me?" asked Otoya.

Rather than be afraid of Otoya, Midori smiled and even laughed a little.

"Do what you want with me, Otoya-san. If you want to kill me, do it. If you want to torture me, do it. I don't care if it's you, I prefer to be your victim that the one of this freaking teacher"

The serial killer approached the blade from Midori, pointing her heart.

"You're lucky, I don't have a lot of time, and torturing you would be too pleasant for me. I'll kill you so quickly and painless than it couldn't be considered cheating on Shiena"

Midori closed her eye, waiting for death. After all she had done to both Otoya and Shiena, she felt like she kind of deserved it, even more. Well, she couldn't complain to at least die in a painless death. Waiting for a moment now, the green haired girl opened her eye, to see Otoya approached the blade from the rope.

"You seem to want to die too much, it's pissing me off to kill someone who don't care dying" said the serial killer, cutting the rope.

"Wait, you idiot! I tortured you, almost killing you, and poisoned you and Shiena-san. How could you forgive me after this?"

"Don't get me wrong, I'll never forgive you, and I don't expect you to forgive me either. I just don't see the point of killing you right now. In the past, I killed for sexual pleasure, but now, I only want to have this kind of pleasure with Shiena. The only reason that could bring me to kill again is to protect my girlfriend, and you don't seem to be a threat for her"

When she had finished freeing Midori, the green haired girl jumped on Otoya and grabbed her collar, frustrated to be taking in pity.

"You'll regret it, trust me you'll…" began to say Midori, before falling on her knees in front of Otoya, extremely tired.

"Come on Midori-chan, even if seeing you in this position is kind of pleasant, please don't loose all your dignity by begging me, it won't work…"

Midori suddenly removed her electric collar and lay on the floor, before closing her eyes. Confused and worried that she might be dead, Otoya checked the green haired heartbeat.

"Don't tell me…she's just asleep!"

"Otoya, do you found something in the basement…"

Shiena suddenly stopped talking when she saw her girlfriend coming back, with a sleeping Midori with her hands tied up on her back.

"I found this lovely girl in the basement, please Shiena could with adopt her? I promise that I'll take care of her" joked Otoya.

"Stop joking, the hell Sasoriza is doing here?"

"Dunno. And you, did you found something on the second floor?"

"Nothing, not even a picture" answered the brunette. "But seriously, why she's here…"

They suddenly heard noise coming from outside. The owner was back, it was a matter of time before this person enters into the house.

"Dammit! Otoya, bring Sasoriza to my apartment, I have to stay here"

"What? No! I won't let you here with this dangerous person…"

"Don't worry, I'll hide and after I see who this person is, I'll leave. I won't do something stupid. I just need to know who the one who try to kill me is"

The serial killer hesitated to leave without her girlfriend.

"Promise me you'll not try to fight with this person, that you'll come back soon?"

"I promise, you don't need to worry" said Shiena.

Resignedly, Otoya left the house with the green haired girl by the broken window. Shiena hide into the closet, waiting to see her enemy. Recently, she succeeded to hack the one who hacked her first. She found that the person used a laptop to hack her. Shiena couldn't found who the laptop's owner was, but she found this person's address. The owner of this house was probably the one who tried to kill Shiena. Suddenly, someone opened the door. The brunette almost shout from surprised and was paralyzed when she discovered her identity.

"Kamikuro…sensei?"

Wait, wut? Reiko is the culprit? How could it be possible...unless it's a trap, the real culprit want to hurt Shiena by making her think that her dear teacher want to kill her. Maybe this person is in fact two people, the Mikage twins! Or maybe it's Kouko's ex-organisation, who know that Shiena helped her to hide...