Assassination Classroom X Reader

|Nagisa Shiota| Promise?

A/N: Yeah........ this just came to me randomly............

Genre: Time Travel, Love Triangle, AU!Nagisa

Guide:
(Y/N): Your First Name
(N/N): Your Nickname

(Y/N)'s POV

I was in class trying to keep my attention on Koro-sensei as he was discussing different chemical compounds.

'Ugh... so boring...' I thought and internally groaned. As I was about to drift to sleep, I felt the ground begin to shake.

'I'm up! I'm up! I was just joking!' I thought and started to freak out.

"Kyaaa! Everyone! Hide under your desks!" Koro-sensei instructed as all of us ducked under our desks as he went to the ceiling and tried to stop it from falling.

When the shaking stopped, everyone lifted their heads up and so no one got hurt and the building didn't collapse or got damaged badly.

"Is everyone alright?" Karasuma-sensei asked as he opened the door with Bitch-sensei behind him.

"Yes," we all answered in unison as we looked around the classroom if anyone was injured.

"Where did that earthquake come from?" Nagisa asked as he helped me up.

"The news didn't say anything about an earthquake..." I said and looked around the classroom.

"The forest!" Kayano pointed out. We all looked outside and saw some of the trees got destroyed and smoke was coming out of the forest.

"What on earth?" Karasuma-sensei muttered taking a closer look by the window.

"Is THAT why there was an earthquake?" Kanzaki asked as all of Class E crowded the windows.

"We should go investigate!" Hinata suggested excitedly.

"Wouldn't it be too dangerous?" Isogai said with worry all over his face.

"It will be fine, Isogai. We got Koro-sensei here to protect us" Maehara said pointing at the teacher with his thumb,

"W-what?!" the teacher exclaimed,

"There might be a forest fire..." Megu said,

"Well, what are we waiting for~?" Karma said with a smirk.

"Adventure!" Nakamura said happily as we all went to the forest with the teachers, much to their dismay.

We followed the smoke and saw a giant hole in the middle of the forest.

"Did something drop from the sky?" Nagisa asked and we saw the broken trees looked like it was a path or pointed to the hole.

"Whatever it is, it must be really big or was just falling really fast," I said and went closer to it.

"(Y/N)-san! Please be careful! You don't know what's down there!" Koro-sensei warned with his tentacles flailing around.

"Don't worry Koro-sensei, I can take care of myself" I said smiling at him and slid into the hole.

"(Y/N)-chan be careful!" Nagisa said as he followed me.

As the smoke cleared out, I saw a body in the middle of the hole.

"A human?" I said as I take a closer look; he had short blue hair, a small and petite body, and was wearing a semi-formal outfit and looked very familiar. I kneeled down and examined his features; I moved his head so I can see his face and moved his bangs away and saw that he looked like a certain feminine boy.