Black tentacles grew on Angel's nape as it flew in thin air, black linings appeared as it marked her skin. Her eyes were hellish, most of her appearance change because of the borrowed tentacles that would only last in 15 minutes. For her, it was enough time to beat the enemies.

"W-Where did you get that tentacles, Angel-chan?!" Koro-sensei asked.

"Does that really matter now? I'll back you up, Koro-sensei. It's impossible for me to compete against those monster when I'm just an Mach 10 tentacles user." Angel retorted.

"...Your right, we'll talk later." she nodded as the both of them began attacking their enemies, right now, each sides were two versus two. 'these tentacles are so hard to wield...' she thought.

"Hey Koro-sensei, if we're going to fight...let's settle it under fifteen minutes."

"Fifteen minutes...?"

"These tentacles and this speed are only borrowed, I could only use it for a minimum of 15 minutes...If I go further more, my brain cells would surely explode, no doubt."

"Fifteen minutes, yes? Okay."

While in the middle of the attack, a tentacle that was aiming for Koro-sensei came up with great speed, however before it could even land a hit on him...

...someone sacrificed them self and took the attack whole-heartedly.

"Look at your front...octopus!" there stood in front of him a stabbed by her chest, Angel who was bleeding marvelously.

"No, no, no! Not only Kayano-san, even you, too...Angel-chan?"

The tentacle left her now holed chest, her fragile body fell on the soil ground as the constant bleeding didn't ceased.

"Humans are so fragile, aren't they? Once they're stabbed by a spear or something sharp, they will be immobilized and won't be able to move for awhile...talk about inconvenience, right?"

"You talk as if your not human...!" she spatted as she held her wounded chest, Yanagisawa chuckled darkly.

"Yuuki-san, I am no longer human. I don't value my life anymore...That's why I will take that octopus' life, and will take his precious students' life!"

Yanagisawa held Angel by her collar while grinning mischievously. She could only glare at him, as she was on his mercy right now.

"...Scum..."

"Huuuh? What did you just said, you holy bitch?!"

Before he could do anything to her, Koro-sensei rushed to her aid as she lifts her down. Suddenly, a bright light with different colors appeared near him as he attacked Reaper 2.0

This light was his emotions past throughout the hellish years that were about to end.

"My pupil...May your graduation, at least, be peaceful." a huge beam appeared as Yanagisawa was trying to escape the attack, not until when Angel cornered her.

"Whoops, where do you think you're going? Bastard?"

"C-Crap! Stop it—"

Her black tentacles stabbed his chest as he screamed in pain, soon afterwards, the dark tentacles disappeared, the fifteen minutes was finally up. So she wasn't caught in the liquefying of tentacles attack.

"Shinigami-sensei...thank you for teaching me how to kill, it's been a good lesson from you." tears silently stream down her eyes as she quietly wipes it away, while she watched Koro-sensei kills her teacher, Shinigami-sensei.

✦ ✧ ✦

"You, with nowhere to go and nowhere to return...I grant you a place to belong. My name is The Reaper. Bearing a posthumous name, you shall remain here. With this name, I make thee my student. With this name and it's alternate, I use my life to make thee an assassin! You will be called as the Red Man!"

✦ ✧ ✦

"The Red Man, huh? He just named it after the toy I have back then..."

Then tears once more, started to stream down her cheeks as her eyes started to swell. She muttered few words of gratitude such as "thank you"

"The tentacles asked me what I want to be, I wanted you to acknowledge me. I wanted...to be like you."

Now Koro-sensei understands how his pupil feels, he ended the Reaper 2.0's life with the anti-sensei's knife as he thrust it in his body.

Then, his body went to a poof, the battle was over...however, no one shouted for joy. Everyone grieved to Kayano who was now dead, they were helpless. Now they feel saddened. Something sharp pierced the air, everyone turned around and saw Soraru slapped Angel on the cheek.

{A/N: My OC is bitched slapped//}

"You fool! If you didn't have those tentacles, that blow might've killed you. Why are you so reckless?!" Soraru yelled as Angel's cheek was red and swollen from the slap, now that her black tentacles and black linings on her skin were gone as her eyes turned normal. She began to feel the pain penetrating in he body.

"If I didn't do that...Koro-sensei might get killed, plus—I'm not reckless! I made sure to keep a safe distance from the enemy and fought my best."

"You're always like this...not thinking about others, only yourself—didn't you saw what happened to Kayano-san earlier?! What if that happened to you? Don't you realize how many people would be sad once your gone?"

"I'm not going to die, Rin! So shut the hell up already."

Before Soraru could do a mouthful lessons of being careful, some students halted the both of them.

"Will you two shut up?! Someone died in here, at least give some respect to the dead! Damn it." Terasaka snapped making the two girls clammed up, now everyone was silenced. Then Koro-sensei started to fix the gut-shot Kayano up, he was really prepared for everything.

They laid her down on the soil ground gently as if she was somewhat fragile as a expensive ceramic vase. Few seconds passed as she coughed, she sat up from her supposed-to-be eternal slumber.

"Kaede! Thank goodness!" she was tackled by a friendly hug, the female turned around and saw Angel, embracing her happily.

"Oh, it's just you...huh?"

"You okay, Kaede? You were shot by a sharp tentacle earlier."

"Yeah...it was a terrible experience, if I would say."

Kayano touched her supposed-to-be holed chest, but to feel no hole because Koro-sensei fixed it for her. "I heard your voice earlier, Angel..."

"Oh, really? What did I said?" she grinned.

"You said: you did a great job, Kaede. I won't let your efforts be a waste, so I'll do the rest, okay?"

"I remember that—Uwaaah!" everyone was surprised when Angel yelled, Kayano looked down to where she was looking at, and quickly shielded her exposed bare chest.

"Don't yell like that, Angel! Cover yours as well!"

"Huh? What do you mean—gaah!"

Both of them quickly covered their bare chest as some boys blushed and looked away. Itona squatted right in front of them while looking at them, rather plainly.

"Pathetic." Itona commented.

An imaginary arrow hit both of their chest from Itona's harsh comment, comically tears stream down from their eyes. Maehara put his vest around Kayano as Karma put his vest around Angel.

"Kyaaah! Don't look, Karma!"

"Heh. Even if I did, I won't see anything. So what's the point?"

"You jerk! I hate you, Karma!"

Then Angel saw that her red scarf was wrapped around Karma's neck, he seem to notice this and smiled. Quickly, he unwrapped her scarf that was around his neck as he wrapped it around her neck.

"Here's your scarf back, it was warm. You look like you when you have it."

"Thank you."

Then Karma ruffled her raven black hair as he smirked mischievously. "But seriously, you have to be more bustier than that..."

"S-Shut up, you pervert!" she yelled, blushing.

Then Koro-sensei fell on the grass, everyone saw how unusually satisfied he was and how unusually fragile he was right now.

"Class, what kind of an assassin would let a dying target escape? Don't you see? It's killing time."

"Fun times are bound to end...That's what a classroom's all about."

The class had no time to hesitate, so they started a majority of wanting to kill or not. Of course no one raised their hands to killing him, no one but Yuuki Angel. Everyone gasped from the majority of kill or don't kill. One to twenty eight.

"Are you still stuck up with your revenge, Angel?!"

"Why, Angel-chan...? Don't you remember the fun times when we discovered a rare stag beetle back then?"

"So...she still wants her revenge."

"NO! YOU GOT IT ALL WRONG!" the sudden out burst of Angel made the class 3-E silenced, they could see that she was shaking from fear.

"I've killed tons of people already, and all of them were pleading for their lives to be spared...but there were some who gave up their lives for me, just like Koro-sensei." she held her head down, depressed from the event that is bound to happen next. Oh how she can't handle the pain without crying.

"Those people who gave up their lives to me, were all suffering...that's why I want to end their sufferings."

Then everyone agreed with her as they started gripping on Koro-sensei, holding them down.

Koro-sensei's weak point:
33) Can be captured if everyone holds him down

"Now, that he's down...who's going to do the killing?" everyone gasped as they looked at each other, then Koro-sensei spoke his dying wish for the last time.

"If I were to choose who's going to kill me, I would want it to be...Angel."

Everyone turned to the girl whose holding one of Koro-sensei's tentacles down, she was surprised.

"Whaaat? I did said that I want to kill him, but I didn't said about being the one who'll kill him!"

"Please, Angel-chan...at least, get your long awaited revenge from me. After all—that was the reason why you came to this classroom, right?"

She was halted as the grip on his tentacle was weakened, she trembled. "T-That's right...but it's too hard!"

"You're saying that now? When you've already kill bunch of victims?" he chocked a laugh.

"I-It can't be helped! If I don't kill them, they'll surely hurt other people. Be it intentional or unintentional." Angel reasoned out.

"Yes...that's why, you have to kill me. It's just like the story of a Spider and a Fly that you mentioned to me earlier." Koro-sensei smiled.

"If you save the fly, the spider will die. But, if you save the spider, the fly will die...You can't save anyone without being forgotten."

Nagisa tapped Angel's shoulder as he handed her an anti-sensei knife. Her eyes widened in surprise. "Take this knife, Angel...at least, grant Koro-sensei's final wish."

"Even you, too? Nagisa...?" she stared at the knife for awhile, then grabbed it before her tears could even fall.

"Koro-sensei, do bare in mind that this isn't for my revenge...I just want you to rest in peace."

"Ah, I know that...Angel-chan. But before I get killed, I'll take your attendance one last time. Once you've all responded, you can kill me. However...no one left early right?! If one of you didn't respond, I'll kill myself—that's a promise!"

Koro-sensei's weakness
36) Disorganized when it really counts

"Do it already!"

"Nyurufufu~ Alright, let's start." Koro-sensei grinned.

After taking everyone's attendance, Koro-sensei smiled happily and said these words:

「べ よろこび」
"Be Happy"

"I'm so happy...to be killed by you all."

Angel sat on top of Koro-sensei as she let out a stifled giggle, she found it very oddly different. "You're so peculiar, Koro-sensei. But...this is kind of frustrating, and really unfair."

"...That life is unfair, is something you know more than anyone else..."

Tears started to roll from Angel's eyes as it streamed down on her cheeks, she let out a force smile before parting away.

「さよなら、ころ せんせい」
"Goodbye, Koro-sensei"

He nodded as he let out a brief farewell with his dying breathe on his death bed. She put all of her emotions into the blade she's holding, then she leaned down and whispered some few words at his ear.

Tears rolled down Koro-sensei's face as he smiled and nodded happily. "Yeah...I do hope so too."

Everyone was confused in what she said, then she thrusts the knife in his chest...then Koro-sensei's body light up bright yellow.

"Congratulations on your graduation, everyone..."

"No, don't go—Koro-sensei!" Angel hurriedly grasped his body, however, she couldn't touch him nor feel him. Tears quickly fell from her eyes as she cried out loud.

"Thank you for the memories, Koro-sensei...I'll cherish them, and goodbye."

The Next Day

Everyone woke up from the slumber in their classroom, the first one who woke up was Angel. She felt her cheeks wet, when she touched it, she realized it was tears.

'So, I was crying last night...huh?' she stood up silently, not wanting to wake anyone up. Angel turned to her right and saw her seat mate who was still sleeping, Akabane Karma.

She noticed that her ripped clothes from last night was replaced with a new one, so she handed back Karma's vest. Noticing that he was shivering from the early March's breeze.

Then from her few movements, Karma woke up from his slumber. His eyes fluttered open as his eye-sight was still blurry, few seconds later his eyes finally adjusted and the first person he saw at his wake was Angel.

"Sorry, did I wake you up?" she smiled at him.

"Angel-chan...? Good morning." he muttered.

"Good morning to you, too." she replied back.

Angel flipped Karma's book of advises from Koro-sensei, she laughed from Koro-sensei's detailed advises for him. Most of it was for their lovely relationship.

"Hey, Angel-chan...about last night, what did you told to Koro-sensei?" she froze on spot as her fingers left the sheets of paper, she looked up and smiled at Karma.

✦ ✧ ✦

Before Angel could kill Koro-sensei with the knife that could kill him, she leaned down and whisper these words:

"I hope one day, you'll be reunited with the person you cherish."

Tears rolled down Koro-sensei's face as he smiled and nodded happily. "Yeah...I do hope so too."

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EDITED ON MAY 10, 2017
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