INTRODUCTION:

He sat at his desk in the empty classroom, having arrived significantly early. Looking out the window far off from his seat, he opened a newly bought notebook free from a title on the front and began printing his fresh thoughts.

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"My name is Nagisa Shiota. I'm a student at Kunugigaoka Junior High School, and in class 3-E, otherwise known as the End class. Our class is different from all of the others at Kunugigaoka. Partially because this is the place they send us rejects to when the school doesn't know what else to do with us. I say partially for a reason."

"The other reason: We're a class training to be assassins. And our target is our teacher, Koro-sensei."

"I've been thoroughly keeping notes on him, writing whatever I notice about him I can find. Weaknesses, quirks, characteristics, actions, abilities, you name it. However… Despite him threatening to destroy our planet, and us having to try our best to kill him before graduation, this term of hard study on him has brought me to realize a lot about Koro-sensei. One factor being how much he cares for his students and takes care of us, in spite of us trying to assassinate him."

"He's helped us on many occasions. So I bought this notebook specifically to write down some honorable moments he's given us as his class. Maybe if he really does blow up the Earth after graduation, he'll somehow find this, and know we still appreciated him."

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He placed his pen down, hearing some slimy footsteps pressing into the wooden floor, thus the planks creaking on its way to the classroom door. The blue-haired boy had quickly hid the notepad and ballpoint pen in his desk, acting as if he was rummaging through his school bag.

The door slid open, a familiar smile which was always pasted on this yellow creature's face poking in. He faced the boy, stopping in his tracks.

"Oh, Nagisa-kun! You're here early!" His tentacles continued to slither towards the podium, one reaching under it, obviously searching for an unknown object.

Nagisa smiled, sitting up in his seat. "Good morning, Koro-sensei. I had some free time. Did you forget something?"

He could have sworn he watched him hide some flan behind his back, hoping the boy's precious blues didn't catch on to what he had lost. "Ah, yes, just some. y'know, teacherly things." The creature chuckled, keeping whatever it was (the flan) firmly behind his back.

"'Teacherly' isn't a real word." Said the boy with a playful grin.

Giving Nagisa a thorough stare with hidden suspicion, the yellow form tilted its circular head. "Is that all? You were free? Nothing happened, did it? At home or on the way..."

"Of course not, Sensei. I thought I left my study book here as well, but I guess I didn't. Found it right in my bag as you can see." He wanted to make sure the lie was convincing. He had no idea whether their sensei checked their desks or anything of the sort after they left. With how responsible he could be.

"Very unusual for you, Nagisa. But I suppose everyone makes mistakes."

Nagisa nodded, hand gripping tight on his pen in the desk. Koro-sensei shook his head. "Well, now that I have what I needed, I need to make a quick run to the convenience store. Is there anything you need?"

"No, Sensei. Thank you for the offer."

"Well, if you're certain, I'll be off now. Stay safe and call if me anything happens!"

With that, he darted through the window, flying at mach 20 speed. Nagisa lifted an arm to shield his eyes from the gust of wind, smiling when it had calmed down. He flipped back open his book, pressing the end of the pen and continuing his writings.

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"Sensei is the only teacher I know who would offer to buy you anything on his way to the store or check up on you to make sure you're okay. It's why I lied so carefully about why I was at the classroom. He might have returned my notebook on the off chance I actually forgot it."

"Well, that's all I have for the introduction. I'll be writing this in chapters and see how this little project works out. Hopefully Koro-sensei won't find it until it's done… Which will most likely be graduation. I'll probably have to give it to him if we don't manage to kill him beforehand."

"END FIRST ENTRY"

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A/N: Hey guys! I've had a recent obsession with Ansatsu Kyoushitsu (Assassination Classroom) and wanted to write a bunch of short stories of how nice Koro-sensei is to his students, so I decided to take all of my ideas and put them down in chapters as if Nagisa was writing them. The official stories will be told in that character's POV and walking you through their experiences and what Koro-sensei had done for them, with a little bit of narration from Nagisa at the beginning and end, so I hope you enjoy this new ride as much as I do!

Peace, babes~!