If you're searching some good animes with shojo-ai subtext, I suggest you Show by Rock!, Re-kan! and Mikagura Gakuen Kumikyoku.
Warning: Contain violence and sexual subtexts.
"Don't worry, Shiena-san, I'll take care of everything. I won't tell anything to Yukari-san. You can trust me, I'm your ally. Take care of you, I'll make disappear the corpse and all the evidence, I'll used to this." Reiko said.
"Thank you, Kamikuro-sensei."
Shiena hung up the phone. The brunette knew she could always rely on her teacher. But somehow, she felt a little guilty to always rely on her. Shiena would prefer to rely on Otoya, but she couldn't trust enough her girlfriend. She was a serial killer, while Reiko was a professional. Which one was more qualified to hid a body?
"Sorry, Otoya. Even it such a time, seisei is the first one I'm thinking of."
She killed an innocent man today. What about Tanaka? That girl was a terrible bully, but maybe like Subaru, she had her reason to be like this. And about the Mikage twins? According to her organisation, they were bullies in the past, but maybe they had changed. Maybe Myojo forced them to attack her. All those thoughts made Shiena wanted to vomit again.
"Why so much people had to die? Why my problems couldn't be fixed without anyone dying?"
Tears began to flow from the brunette's eyes. They were tears of guiltiness. Shiena was in such a psychological pain, it was unbearable. She wanted something to stop this pain, or rather, someone to stop it. This time, Otoya was the first one she thought about.
Otoya didn't know where Shiena was. The brunette seemed weird when she came back from work yesterday. Today her girlfriend didn't came back from school, but she called her to say that she'll be late. Even so, Otoya was worried. The serial killer knew something happened yesterday, and she was kind of hurt that Shiena didn't tell her what bothered her. What she was sure was that Reiko was probably involved, which frustrated Otoya.
"That dammit bug! I don't like her, I won't trust her, never! Why Shiena like her so much?"
The door opened, Shiena was home. Even if Otoya was relieved to see her unhurt, she couldn't forget the frustration she felt. Her girlfriend didn't trust her, but afterall, did she was worthy to be trust? Even her knew that she wasn't trustworthy, how could she be mad at Shiena, who knew it too?
"Where you were?" Otoya asked.
"On a mission for my group." Shiena answered.
The brunette approached from the shelf, turning her back to Otoya. The serial killer couldn't see her face.
"Shiena, what's happened? Yesterday you seemed weird."
Her girlfriend didn't answer. Otoya approached from her and grabbed her shoulder.
"Answer me! I'm not a fool, I know something bad happened. If I can help, I'll do anything to do it, so trust me, please…"
"I did something horrible today, I killed an innocent man." Shiena finally answered.
The brunette turned back, facing Otoya. Shiena's eyes were red, she cried not long ago.
"Huh? You killed someone innocent? Why?! It's impossible, it can't be your mission, why your group wanted you to kill him? That's make no sense!"
The brunette seemed to hide something behind her back.
"I lied, it was a personal mission. I killed an inspector, because he was after you."
Otoya knew who she was talking about. This inspector was the one who forced her to seek refuge into Myojo Academy and was the one who put her in jail the first time. The serial killer was happy to learn that he's now dead.
"Isn't a great thing? Why you were crying? This nuisance was searching me since a long time now, this is a good thing that you killed him. He's not an innocent man at all!"
"Yes he was! He wasn't the one to blame, you are! You're a serial killer, this is normal that cops want to arrest you! I killed him to protect you and I feel guilty. I'm not a monster like you who enjoy killing or can kill without feeling bad. This is your fault! Even with Tanaka it was your fault, if you didn't try to kill her we wouldn't have been in this situation too!"
"Wait, Shiena…"
The brunette suddenly menaced Otoya with a pair of scissors.
"C-Calm down, you don't have to…"
"It's your entire fault, you psychopath!" Shiena shouted.
Shiena slightly cut Otoya on her left hand. The serial killer uttered a cry of pain before recoiling.
"If I never meet you, I wouldn't have all these problems." Shiena said.
"Shiena, please, calm down. This isn't like you…"
"It's your fault too! You changed me! Since I had met you, I kill people more easily. It's not a good thing, I don't want to become like you!"
Shiena raised her hand, the one who was holding the scissor. There was blood on it. She looked at Otoya and noticed that she injured her girlfriend.
"I-I'm sorry, Otoya. I didn't want to hurt you, I just…have changed. I don't recognize myself anymore…"
Feeling even guiltier now, Shiena ran into her bedroom and closed the door. The brunette didn't have the time to lock the door, Otoya entered.
"Listen Shiena, I'm not mad at you, it's just a little cut. I'm not sure why you're angry, but it seems that it's my fault, so I'm sorry…"
"That's not your fault, I'm the one who killed him. That was my choice, I'm only blaming you because I feel guilty. This is so painful that I needed someone to blame, and that someone was you. I'm sorry, I shouldn't blame you for my own act."
The pain wasn't physical, it was mental. Shiena would rather prefered suffering physically than mentally. It's easier to handle pain when it's physical. This gave her an idea. She approached from her girlfriend handed her the scissor.
"Hurt me, Otoya."
"Huh!? What!? Are you out of your mind? Why should I hurt you?"
"Please, cut me all over my body. I want to feel pain by your hands, I want you to mark my body forever. The scars I had already almost all disappeared." Shiena added.
Otoya hesitated. She knew Shiena didn't feel well, that she was probably not in her normal state. Even if she fantasized about cutting Shiena's body with scissor, Otoya didn't do it. She loved Shiena too much to hurt her. But this time, it was a request from her girlfriend.
"Shiena, you're about to give a scissor, which by the way is my fetish weapon, to a sadistic serial killer, and you expect me to cut you with it. I used to kill cute girls like this you know, this is crazy to ask me to do this…"
"I trust you, because I love you. I know you won't kill me."
Otoya finally took the scissor. Shiena trusted her, even if Otoya didn't believe she deserved it. The temptation was too strong, the serial killer really wanted to leave some marks on her girlfriend's body. With her uninjured hand, Otoya began to stroke Shiena's cheek, the one with the slight scar.
"Alright, but I don't want to damage your pretty face. By the way, my hand is still hurting. Lick it." Otoya ordered.
"Y-Yes!"
Shiena delicately took Otoya's left hand and began to lick the blood on it, before licking the injury. Otoya couldn't stop herself from having bad thoughts. She remembered her frustration about Reiko and Shiena relationship. It made her really want to hurt her girlfriend a little. She wanted to lap Shiena's blood on her body, to taste a mix of blood and other fluids. Being able to leave some cuts all over her girlfriend's body seemed to be like a gift to her. When Shiena finished cleaning Otoya's hand, the serial killer pushed her on the bed, scissor in hand.
"If you tell me that you want to stop, I'll stop." Otoya promised.
"You better tied me up, because I'll probably instinctively try to defend myself."
Otoya smiled. Her entire body became warmer and she felt that her crotch became wet. Even if she knew deep down that it was wrong, she felt terribly turned on right now.
Shiena wondered if it was alright, while she was removing her clothes. Of course it wasn't, she only wanted to feel pain to get rid of her guiltiness. She began to be scared when Otoya tied her to to bed, but she trust her girlfriend, she knew she won't go to far. Otoya slightly touched Shiena's skin with the scissor.
"Be ready, I'll begin!" Otoya warned.
Shiena gritted her teeth when Otoya began to slightly mutilate her belly, uttering some weak moans of pain.
Shiena regained consciousness. Her body was in such a pain that she couldn't move. Her mind was terribly dizzy and her vision was blurred. She remembered what happened. She had sex with Otoya while she was tied up, while her girlfriend did several cuts on her body. It was a mix of pain and pleasure, it was so intense that the brunette lost consciousness. Her body was now covered of multiple bandages. Otoya was sitting beside her.
Otoya couldn't deny that she didn't like what happened tonight. To be able to sate her bad desires on Shiena had being something pleasant. Hearing the brunette's voice, that was a mix of moan from pain and pleasure, was like listening a beautiful music. Her crying face, mixed with an expression of pleasure, was such a turned on thing to watch. Otoya never had so much pleasure to hurt someone. Even if she had liked it, she was worried about what happened.
"Some cuts are really deep, maybe you should go to hospital." Otoya proposed.
"And I'll say what to the doctor? That I did knife play with my girlfriend?"
"Well, you could say that you suffered from a serious self-harm problem."
Otoya lay down beside Shiena.
"Even if I kind of like that," Otoya began, "I would prefer not doing this again. I controlled myself enough today to not seriously injuring you, but I can't promise that I could always be moderate. Beside, why did you want to do this? Are you secretly a masochist?"
"No, I don't particularly like feeling pain. I just felt like I deserve a punishment, and I'm scared that maybe one day we'll be separate. I wanted to remember you everyday, to know that our story together is real. Those marks will be the proof."
Otoya suddenly kissed her girlfriend on the lips.
"Silly girl, you don't deserve to be punished and you don't need this to prove that our story is real. I'll make sure that nothing will separate us!" Otoya said.
Relieved by Otoya's words, Shiena smiled and kissed her on the cheek. Suddenly, Otoya hugged her, while being cautious to not hurt her. She approached her mouth from the brunette's ear to whisper something.
"Beside, I'm the one who decide when you deserve a punishment. Don't worry, if you do something that bother, be sure that I'll punish you properly, my dear Shiena."
