Hello:) this is a request from R5islegit . I am sorry if this is a short one, but that's my first Nagisa x Reader . Hope you will like it though :) here we go~

25/2/16: hey guys, I updated this chapter a little as I saw a lot of mistakes, don't worry, not the whole story has changed, just those mistakes:) bye
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Normal POV.

Class 3E, also called the 'End class' from the students of the main building, was where you were heading right now. You actually really liked that class, the people there were nice, understanding, respectful (well, most of them), kind, and also hard working. To you, this class probably was the best one of the school even if the others from the main building said the opposite. At least, you weren't some brat (i feel like Levi right now) that worked way too hard for nothing and that constantly brought down others, and by others I mean the E class kids. Anyway, back to what you were doing, you where walking like every morning to your class. You actually had a plan to kill Korosensei, well I mean try to kill him 'cause that octopus didn't get his name for no reasons. The plan was pretty simple, you will put a few bb bullets on the ground, call him over for help, than shoot at him while Nagisa shoots him from the back. Oh, did I forget to mention that Nagisa was in your plan? Well he is, everyone knows that he is one of the most well informed and skilled when it comes to assassination. And you might have a small, no scratch that, a huge, and when I say huge I mean as big as an elephant with a giraffe on its back that has itself a whale on its back, crush on the boy. You didn't know why and how you got to like the boy but you did. Maybe it was the fact that he was kind, or maybe cute? This you never knew...

~Time skip brought to you by Erwin's eyebrows~

It was after lunch and you had time to install your bbs without having Korosensei noticing. Nagisa looked over at you, waiting for the signal. You slightly nod towards his direction, telling him that you where ready, before looking back at the front and calling Korosensei.
"Korosensei!"
"Yes (y/n)-chan?" He simply replied.
"Can you help me with this problem please, I don't understand it."
"Nurfufufufu, of course (y/n)-chan~" you quickly glanced at Nagisa than back at Korosensei. Your grip on your gun tightened as you saw him slowly approaching. Surprisingly he didn't see the bbs and walk straight into them, he then was bombarded by you and Nagisa, soon the rest of the class followed. You all stopped to check if you got him and realized it was a fail, again. You closed ypur eyes and sight. Nagisa looked at you, an apologetic smile on his face. He spoke, which made you look up.
"Hey, it's okay (y/n)-chan. At least your bbs on the floor worked." If it was anyone else that would have said that, you wouldn't have cheered up a bit, but it was Nagisa. You don't know how but he always made you perked up.
"Thank you Nagisa. I still feel bad for dragging you into this."
"Eh? What do you mean dragging? I like helping you out (y/n)-chan." A tiny blushed appeared on your face has he said that, but thankfully no one noticed, except a yellow octopus that directly started writing notes in his little gossip notebook.

~Another time skip brought to you by Kuroo's sexy as f**k grin~

It was later that same day and you had PE with Karasuma sensei. You had to spar in pairs, you where going to go ask Nagisa but he beat you at it.
"Hey (y/n)-chan! Do you want to spar?"
"Sure Nagisa!" You said with a genuine closed eye smile that made him slightly blush, but no one could see it, except a certain pink Korosensei that was hiding behind the threes while doing is well known 'Nurfufufufu~'.
You spared (is this how you write spar in the past tense?) For about half an hour before you finally had a small break. You went to get your water bottle when Nagisa asked you all of a sudden
"(Y/n)-chan, do you want to walk home together tonight?" This was pretty normal as you will both walk home once or twice a week, with Karma being included in your walk to sometimes.
"Sure."
"Ok, cool" he then walked to Karma to continue his conversation with him. Little did you know, a well known teacher of yours was once again, behind a three, taking gossip notes.

~Another time skip brought to you by Kou's love for muscles~

It was finally the end of school and it was time for you to walk home with your crush. Talking about him...
"Hey (y/n)-chan, you coming?" Nagisa spoke, taking you out of your thought.
"Yeah, wait a second." You stuffed all of your stuff in you bag and ran to the door, what you didn't know was that a certain blue headed was waiting for you behind the door frame and was walking in to check on you. When you ran at full speed you crashed into him, but not only your bodies collided with each other, ho no it would have been too easy, your lips also smashed into each other. When you realized what was happening, which was a few seconds later, you pulled back as fast as you could. You where blushing like a mad woman and didn't say a word. Finally, Nagisa broke the awkward silence.
"I-I a-am so-sor-ry (y-y/n)-chan..."
"No, I-I am sorry."
And once again, was there our favorite gossip loving teacher, standing in the corner all pink and again, taking notes.

~They are way too many time skips in this story~

It was the day after the incident and when you and Nagisa would  look at each other you will both look away quickly while blushing. It even came to the point where Isogai asked you if you didn't have a fever.
"(Y/n)-san, are you sure you are okay?" You were about to respond but Karma beat you at it.
"Ne, Isogai-kun, don't you understand~? (Y/n)-chan doesn't have fever but she simply is blushing because she remembers what happened yesterday~."
"Ehh? How would you know what happened yesterday?!"
"Lets just say I was following Korosensei, and he also happened to have marked down what happened to."you then jumped on Karma, trying to kill him in a way or another until you were stopped
"Karma you-"
"(Y/n)-san, don't go kill him! He is our best chance for killing Korosensei right now!" You sighed as you knew you couldn't resist the ikemen.
"Damn you Isogai and your Ikemen personality..."you muttered under your breath. You decided to go talk to Nagisa, to sort things out.
"Nagisa, we need to talk about what happened. Do you want to do it after class?"
"...okay..." well, if that wasn't awkward.

~Another fucking time skip, too many time skips!!!!~

It was finally the moment you've waited for your whole day, no, not a new season or chapter of BeelZeBub, although it will be nice as it is finished. Why Oga, WHY?! Anyway, back to you and Nagisa, you've waited for this moment but at the same time you weren't so sure about it being a good idea anymore. You where waiting patiently for Nagisa until he finally came.
"Gomen (y/n)-chan, I had a question to ask Korosensei."
"It's okay Nagisa."
"You wanted to talk about what happened yesterday, right?"
"Yeah..... Once again, I am really sorry Nagisa for that..."
"Dont worry, it was also my fault. And I am sorry for also making things awkward between us."
"Its okay. Its just that it was weird, you known, cause it was all of a sudden."
"Yeah, it would have been better if we where both prepared for it to come..." then a thought came to your mind, why not tell him now how you feel about him. What you didn't know is that the same thought came across his mind.
"Nagisa I need-"
"Wait (y/n)-chan. I also have something really important to tell you and I wouldn't want it to ruin our friendship. But I need to tell you."
"..okay..."
"Ireallylikeyou!" He bown shouted really quickly (Kayegema, what are you doing in Nagisa's body?!
Tobio: what are you talking about?!) . Although it was said quickly you still understood it. You where really happy and excited that he liked you back, but right now you didn't know what to do. You stayed there, staring at him wide eyed with your mouth slightly open. He then spoke again.
"I am sorry (y/n)-chan, I don't know what I was-" you cut him off by a kiss. And then it is your turn too apologize. And his turn to stay there wide eyed.
"Gomen, Gomen Nagisa!! It's just that I really like you to and that-"
You where once again cut off by a kiss, but this time, you kissed back. You both felt really happy to have each other like that and you wouldn't change it in the world.

~~~Extended Ending~~~
"Nurfufufufu~" said a pink Korosensei "My ship is finally real, Nurfufufufu~"
"Ne~, Korosensei, you know it's rude to stalk people like that?" Said a smirking Karma.
"You have too be punished, and by that I mean...killed."
It ended up in Karma chasing Korosensei around the forest while you and Nagisa where walking home, hand in hand.

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Hey guys:) sorry if the ending is bad but I am not used to write oneshots. And also sorry if this story is bad but I tried my best, and it's also my first. This story is longer than I thought ot will be tough, so hope you liked it;) if you want to leave requests, leave them on the requests page and I'll see you guys soon:)
~Author-chan