Hey there, everyone! BlueSkyBlue is back with another Ansatsu Kyoushitsu/Assassination Classroom fan fiction. I know, I know, I'm supposed to be posting the companion fix to Falling in Love, but I'm currently out of country and I didn't bring along my book of randomness, which I write all my stories in, so I decided to write this and post it up instead. Now, this popped up in my mind, so I decided to write this. Then it depends on your support whether I will continue writing this or not. This has been on my mind since chapter 143 of the manga, so yea, to those who have not read the manga, spoilers alert! This is not my first angst fanfiction, but it is my first angst fanfiction for Assassination Classroom. Plus, angst is certainly not one of my writing styles, so please don't flame if there isn't enough feels. I suck in writing touchy feely kind of fanfictions, and I have to admit, I am not the best writer you can find. And I am ranting as usual. Anyways, I hope you all enjoy this fic, and please do give constructive critism, especially when it comes to me and my grammar mistakes. They happen. XD

Crystal Tears

Summary: Inspired by chapter 143 of manga, so spoilers alert! What if, Nagisa had another reason for wanting to help save Koro-sensei? Yet, his classmates did not give him the chance to explain. Karma beats Nagisa up and Nagisa finally snaps.

Yay, that's the summary of the story. Now on to the disclaimer, but seriously, everyone knows I do not own Assassination Classroom.

DISCLAIMER: I DO NOT OWN ASSASSINATION CLASSROOM, FOR IF OWN IT, I WOULD'VE MADE KARMA AND NAGISA A COUPLE ALREADY!

Chapter 1: Breakdown

It took everything in his willpower not to cry out.

Nagisa did not even understand what was going on. Why is Karma beating him up? Isn't Karma his best friend? An image flashed thorough his mind.

"Heh! Puny little kid! What do you think you are, sucking up to sensei like that?!"

His mind became cloudy. What is happening? Is it another one of his mother's episodes? What did he do to make her angry this time?

"Ungrateful child! I've done so much for you, and this is how you repay me?!"

Nagisa closed his eyes as the punches came flying on him. This was a daily occurrence after all. Its just that he did not know what he did to make his mother so angry. Tears of pain betrayed him and started to leak out from his closed eyes.

"I'm serious about this, you know!" he managed to choke out. "If you are telling me to tell you how I feel with all my might then-!"

"Bullshit!" Karma's voice cut him off. Why is it Karma beating him up instead of his mother? He didn't understand it. "Do you even understand what the others will feel if we go along with your plan?"

Nagisa opened his mouth to protest, but Karma chose that moment to land a particularly strong punch at his stomach. "Ugh!"

"You are not even thinking about how we feel!" Karma yelled angrily. "Where is the Nagisa I knew?"

"It's because of you I lost my husband!"

Nagisa heaved a sigh, welcoming the punches. After all, to accept is better than to resist. He learnt that from many years of experience.

"You are seriously growing cocky lately! Just because you defeated that Takaoka twice doesn't make you better than us!"

That was when something in Nagisa snapped. He opened his eyes and Karma immediately stopped in his tracks when he saw the expression on the seemingly angelic teal head boy.

"If I am really better than you guys, I would have won already!" Nagisa screamed. "I was wrong about you, I was so wrong, to think that you guys would be different! YOU ARE ALL THE SAME!" He took opportunity of Karma's shock to get up, wincing because of the bruises he sported all over his body. Staggering a little, he started to walk away, then, when he could get one foot in front of the other, he broke into a run.

There was silence.

"What was that just now?" Terasaka finally asked.

Karma just stared at his hands as if he couldn't believe what he had just done. Had he just beaten up his best friend?

Isogai jumped to his feet and ran off. "Nagisa? Nagisa!"

But Nagisa did not reply.

The assembled group did not have the guts to go to class. The meeting was held before classes started for the day, and now, they all don't feel like studying or having lessons.

Isogai came running back, panting. He took a few deep breaths before shooting a killer glare at Karma, something the ikemen never did. Ever.

"What were you thinking?" he demanded, in such an angry tone, nobody recognized the ikemen before them. "Nagisa was obviously shaken just now!"

"What do you mean?" Kayano asked, almost timidly and shaken by the display of what Nagisa did earlier.

Isogai let out a long sigh and ran a hand through his hair. "Did you all not see his eyes? They were desperate. He did not even react when Karma started hitting him! Instead, it seemed like he was welcoming it," he frowned worriedly. "Even the past few days... Nagisa has been acting weird since a few days ago."

"Excuse me?" Nakamura asked. "We have all been acting weird ever since Koro-sensei announced that he was once human."

"Not that kind of weird!" Isogai exasperatedly exclaimed. "He has been distancing himself from us lately. Even just now, he was acting as if he's a disease to all of us! Also, he would flinch when someone approached him! Those things are really weird!"

"Now that sounds weird~! Who is it~?" an all too familiar voice rang out.

Everyone turned to see Koro-sensei standing behind them, tentacles flying around as usual.

"Koro-sensei!"

"Ohayo, minna-san! Now do pray tell me why you all are gathered here and not in the classroom?"

Karasuma-sensei came running out next.

"What happened?" he asked. "I bumped into Nagisa just now. He was crying but he ran away before I had the chance to stop him."

Wait.

Nagisa was crying?

Suddenly, Karma felt guilty of his previous actions.

"What happened?" Bitch-sensei demanded.

Everything poured out. The students took turns to tell the teachers what had happened. They told them about Nagisa calling the meeting. They told them what Nagisa talked to them about. How Nakamura and a few others disagreeing with the idea. How Karma approached Nagisa with his own opinions. That Karma started the fight. How Nagisa suddenly broke down and ran away. The three teachers listened gravely.

For a while, there was silence.

"You did not give Nagisa time to explain himself?" Koro-sensei asked at last.

The students hung their heads down guiltily.

"I expected better from al of you." They flinched at Koro-sensei's disappointed tone. "I don't care whether you kill me or not, but I expect all of you to understand each other. Isn't the E class a family?"

Shame began to overwhelm the students as the atmosphere stiffened. It was as if they were expecting Koro-sensei to lash out at them.

"I'm sure Nagisa will be back soon," Bitch-sensei tried to lighten up the atmosphere and cheer them up. "He is, after all, a strong guy."

But Nagisa did not turn up the next day, nor the day after.

In fact, he did not turn up for the rest of the week.

And that's it from the first chapter. I'm not sure whether I will actually continue this fic. For the time being, it is only a random idea I had for a long time and I really want to know how you all think. I will be updating the companion fic to Falling in Love in a week's time so there will be enough time for this fic to get more comments and such. Let me know, either in the reviews or PM-ing. I would really appreciate it! Once again, thank you to all of you who have always supported me in my fanfics. Honestly, thank you!

Yours,

BlueSkyBlue,

a.k.a. Otonashi Hayuka