A Wish Come True (Nagisa Shiota x Reader) (DISCONTINUED FOR NOW)

Familiar....

Your POV
Everyone was holding a gun, about to shoot the teacher, when I interrupted them.
The whole class turned to look at me as I looked at them.
What is going on.... Can my day get any worse?
First I have to go to e-class..
Then I have to run up so far away to get here...
And now everyone is about to shoot the teacher....
No one seemed to know what to do, as well as I.
Is this the wrong class?
I looked over at the teacher that everyone was about to shoot.
.......
A very tall yellow...... octopus, thing, (because I clearly see tentacles) wearing a black academic dress with a tie with a crescent shaped moon on it.
Yeah I'm leaving....
I turned around about to walk out of the classroom, when someone blocked my way. I looked up, nervous about who was in front of me. With all I've seen today in less than 25 minutes, of course I would be nervous.
A tall man with black hair stood in front of me.
For some reason a relief.
He look down at me.
"You are the new student?"
I didn't answer. (I didn't know what to answer anyway)
He didn't say anything else. I'm guessing he wanted me to answer first.
"Y-yes?"
"We will explain everything later" he said.
Great.... do I really want to know?
I walked in the classroom a little more. My cheeks burning a little.
Everyone then put their weapons down.
"Welcome I'm Koro-sensei, your teacher for the year!"
Koro-sensei, huh... so that's his name..
"Now please introduce yourself!"
"O-oh! Um right! I'm (F/N) (L/N), t-the new student!"
"Welcome! You can sit in the back with Karma." Koro-sensei said.
"Um o-ok, thank you."
Well I mean that's the only empty seat...
I was walking to my seat, when something caught my eye. Blue. A light blue shining in the light.
I sat down at my desk,
Only thinking...

Why was that blue seem so familiar?
(So sorry if I did the characterization wrong!)