He could choose Karma. Allow the man to inject his friend with the serum that turned Nagisa into this since square one. Then Nagisa wouldn't have to suffer; he wouldn't be alone because someone suffered with the same thing as him. But what about afterwards? How will Karma treat him then? Would their friendship finally break?

Or he could choose himself. He could allow Takaoka to inject him and turn the blunet into an even bigger monster; and everybody would fear him. His friends would abandon him; would want to kill him. Karma would leave him in the dust. Nobody would love him; care about him. They wouldn't even want to see him alive.

Just like when he was first transferred to Class E.

"Don't do it, Nagisa..!" A hiss cut him off, and Nagisa looked up. Karma glared daggers at him.

"Just let him inject it into me. I'm ready to take it—"

"It's not your decision!" Takaoka snapped. He turned to Nagisa with wide and threatening eyes.

"Better hurry up, brat!" He shouts, leaning the needle closer to Karma. Nagisa felt himself freeze. He usually does well under pressure, even if it's a life and death situation. But this was both Karma and Nagisa's friendship on the line. He didn't want to ruin it; they were too close for it to die out.

It was when Nagisa looked up, bloodlust clear in his eyes. He glared at Takaoka.

"Let him go. Inject me." He said, dangerously calm. Karma's eyes went wide, and Takaoka just smirked.

"I knew you were daddy's good boy." He threw Karma away, and walked towards Nagisa. The blunet looked at his former teacher, a small smile crawling up his lips. He slowly swayed to Takaoka, and finally, his grin deepened. He quickly slunk out of the way and twisted behind Takaoka, knocking him to the ground. He knew his snake abilities made him more agile and quick, so why not use it to his advantage?

As the adult knew what was happening, he fell to the ground and quickly got back up. Nagisa looked at him, the smile he used when he first assassinated Takaoka coming into play.

"You little shit!" He got to his feet and reached for Nagisa, who dodged and raised his leg, side-kicking Takaoka's cheek. He stumbled back, the kick not strong enough to send him to the ground. The man rushed for Nagisa, and reached for his arm. He succeeded, and pulled him close. Nagisa squirmed violently in his grip, screeching and hissing. He saw that the needle was only inches away from his arm, so he struggled as hard as he could.

"Leave him ALONE!" A voice snarled, and Nagisa felt his foe loosen his grip on him, and he used that to kick the needle out of Takaoka's grasp. It flipped in the air, gravity acting on it when it spiralled to the ground. Glass shattered, the liquid spilling out of its casing. Takaoka was beyond pissed as he was knocked down, pinned by none other than Karma Akabane. He looked at the teacher with menacing eyes.

"Oh, you messed with the wrong guy!" He shouted, elbowing Takaoka's jaw with power. Blood spewed from his mouth, making him even angrier. As he shook in Karma's iron grip, the red head whipped his head to Nagisa, who stiffened at his gaze.

"Get something that can bind his movements! Hurry!" But Nagisa didn't move. He just glared down at the struggling teacher, and a small voice in his head said:

"Kill him."

No. He couldn't live with the guilt of killing a person; even if they were cruel. But, this man is dangerous. He hurt him, he hurt KARMA.

Nagisa needed to make a decision. And quick. So he scrambled to find some duct tape, and ran for a back room. As he opened the door, his eyes went wide at the scene.

It looked like a laboratory. A wide, metal table was in the centre, computers functioning almost too perfectly for an old building. Nagisa searched the room, rustling through the various draws that contained empty, glass needles. They looked familiar some how. But he decided to push that aside and focus on the task at hand. He continued to search, and successfully found a roll of duct tape in a drawer and bolted for the other room his friend was in. The first thing he saw was Karma still pinning Takaoka down. He ran to his side to help him, and began to tape his arms.

"Jeez, with your snake speed I thought you'd be faster." Karma joked, smirking at his blue haired friend. Nagisa just blushed at his remark and wrapped Takaoka-sensei's hands together. Their abusive ex-teacher struggled, making Nagisa lose his balance and flip onto Karma, knocking the two down. The two friends found themselves too close for comfort, and both shot up in surprise.

"S-Sorry, Karma-kun..." His voice was like glass; smooth and fragile. Karma just smirked.

"What? You thought we were gonna—"

"Ah, no! Karma, why would you think—" a battle cry rang through the air, and Takaoka leaped for the two. Nagisa and Karma dodged swiftly, maneuvering themselves for an chance to take Takaoka down. It was when the former teacher's attention was on Karma, so Nagisa climbed onto his back and wrapped his arms around the adult's throat. The two fell backwards, with Nagisa still trying his best to maintain his strength. However, he felt Takaoka shift, then pull out something shiny. The next thing the blunet knew was that he felt something weigh down on him. His head hit the marble flooring, making him go almost deaf. His ears began to ring and all he could hear was muffled screams.

Then, pain in his shoulder. Nagisa felt his body tense up, then shake. His breath was caught in his throat as he attempted to breath. His vision began to darken, and all he could think of was one possible explanation:

Takaoka injected him.