Assassination Classroom X Reader

|Nagisa Shiota| Promise?

"Nagisa...kun?" I thought out loud.

"What is it?"

"Gah!" I sputtered, falling onto my butt and saw Nagisa right behind me.

"You startled me!" I pouted,

 "S-sorry, what did you find?" he asked looking over my shoulder.

"Is that... me?" he asked as surprised and confused as I am.

"I'm not quite sure. We might need to ask Koro-sensei and Karasuma-sensei about this" I said standing up.

"Y-yeah," he said and we went back to the group.

We went back to the campus with the unknown person (Koro-sensei carried him) and he was sleeping in the clinic. Me, Nagisa, and the teachers were in the clinic while the others were outside since the room was too small.

"Doesn't he look like Nagisa-kun?"

"They look too similar...."

"The hair... the frame..."

"And they're about the same height too"

"It's so freaky...Nagisa-kun doesn't have a twin, right?" as the students mumbled and whispered around, I examined his face again.

"You two look too similar," I said to Nagisa.

"It's so weird..." he said also looking at the mysterious person. As a million thoughts and questions ran in my mind, the person stirred in his sleep.

"He's waking up!" Bitch-sensei whispered and shushed us as we observed him.

3rd Person's POV

The mysterious person woke up from the noise and saw the ceiling.

'What happened....Where am I...?' he thought and looked around his surroundings. He saw familiar faces all around him, but one stood out the most.

"(N-N/N)...?" he called out surprised but happy at the same time while the girl seemed shocked and embarrassed about the nickname.

"M-me?" she asked pointing to herself and the mysterious person chuckled and pulled her to a tight hug surprising the whole class while a certain red-head and blonde girl took out their phones.

"It really is you!" he said happily crying into her shoulder while (Y/N) seemed too shocked to react.

"I missed you so much..." he mumbled as he let go of the hug smiling at the girl and caressing her cheek. "I...really missed you..." he said sealing her lips with a kiss surprising the girl even more and making her face all red.

"EEEEEEEEEEEEEEHHHHHHHHHHHHHHHHHHHHHH?!?!?!?!?!?!?"  the whole class said surprised and blushing while Karma and Nakamura took pictures of the two like the freaking paparazzi, Koro-sensei violently writing on his notebook, Bitch-sensei observing the kiss and counting how many hits, Karasuma froze like a rock, and Nagisa looked like the most shocked and affected person in the room.

"Hey, Nagi..."

"What is it, (N/N)?"

"If I leave, would you forget about me?"

"W-what kind of question is that?"

"It's just a thought...."

"Liar. You're hiding something from me, aren't you?"

"Hmph...fine. Papa got a job in America. We're going to be gone for a few years..."

"What?! When will you be back?!"

"I don't know! They said that we'll come back for junior high..."

"...That long?"

"Yeah......"

"...Of course, I wouldn't. How could I even forget about you?"

"Maybe you'll find another girl to be your best friend..."

"Idiot. You're the only one for me"

"Then... will you wait for me?"

"Huh?"

"Wait for me to come back, I mean"

"...Yeah, I'll wait for you. As long as YOU don't forget about me"

"Of course!"

"Promise?"

"Promise!"

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"I kept my promise...but you never came back..."