The first chapter has been corrected by HolyBhunivelze.

"Shi…"

Otoya couldn't expect what she saw when she opened the door. A tall and a little bit tomboyish woman was holding her girlfriend into her arms. Right now, Otoya clearly understood what jealousy was.

"You better tell me quickly why you are holding Shiena and why she seems unconscious"

"Not need to be harsh, I'm Kamikuro Reiko, Shiena-san's teacher. She didn't tell you about me?"

Of course the brunette told her about her teacher, enough to make Otoya jealous.

"Come inside, you have things to explain to me" Otoya asked, which sounded more like an order.

Reiko entered unflinchingly into Shiena's apartment, still holding the unconscious girl into her arms.

"I should put her into her bed" began to say the teacher. "She's exhausted"

"Dammit, what did you do to her!?"

"Me? Nothing. Someone she trusted deeply betrayed her, this is probably why she fell uncouscious"

Otoya noticed that Shiena had a bandage on her arm. Someone hurted her, and it didn't seem to be Reiko. In fact, the teacher was probably the one who took care of her wound. The serial killer showed her where the bedroom was. After Reiko put the brunette into her bed, she went to the living room, where Otoya was waiting her.

"The traitor, was it Mikage Hiyori?" asked Otoya.

"Yes, she's the one who betrayed Shiena-san. The Mikage twins were the culprits you were looking for" explained Reiko.

Otoya was shocked and surprised. Shiena never clearly told her that she was suspecting Hiyori and Tatsuya.

"W-what?! Her friends are the culprits? But…how?"

"I see, Shiena-san never told you that she was suspecting them?" asked Reiko with a smirk.

Otoya didn't like the way the teacher was talking to her.

"Shiena hide a lot of things from me recently" said Otoya.

"Oh, really? That's strange, lovers aren't suppose to hide things to the one they love"

Definitly, the serial killer didn't like Reiko.

"Do you know who I am?" asked Otoya, menacing.

"Yes, you are Takechi Otoya, Jack the Ripper of the 21st Century, a notorious serial killer" answered Reiko. "So what? You thought that I might be scared of you? Not at all. You know why? Because your girlfriend likes me, you don't want to hurt her, don't you? This is why you won't do anything wrong to me, Takechi-san"

Even if it was painful do admit it, Reiko was right. Shiena had affection toward her teacher, if Otoya hurt or kill her, Shiena would hate her.

"And no, the Mikage twins aren't the culprits" suddenly said Reiko. "They were the culprits"

First, Otoya didn't understand what Reiko meant. It took her few seconds to notice the verb difference.

"You mean that…they are now…dead?"

"Yes, I can certify that they are both dead. I personaly killed Hiyori-san. She was about to kill Shiena-san, she's the one who hurt her. I killed her just in front of Shiena-san. Poor girl, her friend betrayed her and she saw her died. That was too much for her, this is why she lost consciousness. I didn't want to do that, but I have no choice. I did this to protect her"

"And what about her brother?" asked Otoya. "He disappeared, how can you know that he's dead? You couldn't know, unless…you're the reason why he disappeared…"

The teacher smiled a little bit.

"I didn't kill him, if it's what you want to know" answered Reiko. "But I know that he's certainly dead now. I discovered that his name was on Collective Dismissal's black list. He was a notorious bully, a member of my organisation killed him. We are cautious, we make sure that nobody will find our targets' corpses. This is why he's still considered to be missing"

The serial killer sat on the couch, bothered by what she learned from Reiko.

"Even if it was the Mikage twins the culprits, why they did that? What are their motives?" asked Otoya.

"There have a lot of different bullies you know, with various motives. The Mikage twins were particularly nasties. They target people who already are victim of bullying in the past. They pretended to be their friends, before bullying them. They never actually tried to kill Shiena-san, they only wanted to torment her"

This could explain why someone sent the message to Chitaru. If the culprits didn't want to kill Shiena, then it would be logic that they sent a message to someone in order to save her.

"But you said that Hiyori-san tried to kill Shiena!"

"Indeed, but that wasn't her initial plan. I don't know how, but she leared about Collective Dismissal. She suspected Shiena-san to be the reason why her brother disappeared. I don't know exactly why she tried to kill her, maybe she knew that her brother is dead and thought that Shiena-san killed him"

Otoya remained quiet, listening to Reiko's explanation. She didn't fully trust Shiena's teacher. Something was terribly wrong about this woman, she knew it. Even if what Reiko said was true, she was probably hiding something.

"They stole my laptop and used it to hack Shiena-san's computer. That was a trap to make you believe that I was the culprit"

"Or, you were their accomplice since the beginning, you were the one who hacked Shiena and you convinced the Mikage twins to secretly bully her"

After this sudden accusation from the serial killer, Reiko laughed a little bit, before smirking.

"If I'm the real culprit, why did I save her and killed my supposed accomplice?" asked the teacher.

She marked a point, Otoya couldn't deny it.

"It was only a possibility" said Otoya.

"I don't appreciate to be suspected like this, since I'm totally not guilty" said Reiko. "Anyway, why do you suspect me? You don't seem to trust me either, even though I'm in the same organisation than Shiena-san…"

"Midori-chan was also a member of Collective Dismissal, and she was a total bitch. She almost killed both me and Shiena…"

"She wasn't a member of our group when she did this"

"She was still a member of your group when she captured and tortured me"

"She only attacked you when she was in our group, not Shiena-san"

"What does that mean?" asked Otoya. "You won't attack Shiena but you could attack me?"

"Don't worry, I won't. Hey, Takechi-san, you're the one who freed Sasoriza-san from me, don't you?"

Otoya suddenly rose up from the couch and approached from the teacher.

"Yes, it was me. The way you were torturing her was quite interesting in fact. I see that you're specialist in torture. Another reason to not trust you, you seem to be a psychopath, like…"

The serial killer hesitated to continue talking.

"Like you?" suggested Reiko. "You think that I'm a psychopath like you? You don't trust me because I'm like you? How interesting, at least you know that you aren't a person of trust. If we're so alike, maybe we could get along"

"Shut up, like hell it would happen"

Reiko laughed madly. She was like a mad scientist, her lap coat accentuated this comparaison.

"You're such an interesting person, Takechi-san! I'm starting to like you a little bit. I should go now, good night! Oh and, please don't be too harsh on Shiena-san. She hid a lot of things to you, but you should understand her. You can't blame her to not trust you, you already admitted not being a person of trust. Good bye!"

Reiko smiled meanly to the serial killer, before headed to the door.

"Wait, Kamikuro-san"

The teacher opened the door but stop walking.

"What it is, Takechi-san?"

Otoya's gaze was crazy and menacing. She was smiling madly, like she was about to kill someone.

"I don't like you. You're an annoying bug. I'm warning you, if you try do do anything wrong to my girlfriend, you'll get caught into my web!"

Yandere Otoya! She's the spider, Midori the scorpion, and Reiko the bug. Seems like the culprits are dead now, Shiena should be safe now, right?