Experiment: Armin x Reader

Chapter 1

"Ah I'm so tired" I said with my head on the table

"You just woke up" Eren pats the top of my head

"Can't I be lazy for one day?" I said not looking up

"Its been so long since we've been like this" Armin says and I look up at him

Ever since we were little I had a small crush on him, he would show me his book and we would always talk about leaving the walls together.

"You're right, just us four like we used to" Eren gives a thumbs up which makes me giggle

"So what's is the agenda for today?" I asked

Before anyone could answer Jean comes inside the mess hall

"Hey Eren and (Y/N), Hanji wants to see you both" he says and leaves

I wonder what for, I can tell why Hanji would want Eren, but why me?

The both of us stand up and wave good bye to Armin and Mikasa and leave. Once we got there Hanji tells me that I have to help her with an experiment she's been wanting to do

"Okay then, what's the experiment" I asked

"We're going to conducted on Eren, and I wanted you to help me since you have helped me before"

Eren looks a bit timid when he finds out Hanji was going to do something to him but he relaxed and said yes to it

"Now, it's just an injection, I want to see if this will help you hear us when you're in titan form" Hanji then takes out the needle and injects Eren

"So how long do we have to wait?" I asked

"Not so long-" before Hanji could finish a flash of light appeared and we couldn't see Eren

"What happening?"

"I don't know" Hanji says trying to stay calm

When the light disappeared we both openers our eyes to see Eren. . .

"E-eren" I said

He looks up at us

"Hanji what did you do! Eren is a little kid now!"

"I didn't think this would happen"

Eren looked at us confused and I walk towards him and hold out my hand which he accepts and I lift him up

"How are we going to explain this to Corporal Levi!" I said to Hanji

"We won't, we can't tell him. It's a our little secret."

"He's the main protagonist! We won't be able to keep this a secret"

I look at Eren and he looks at me and wraps his arms around my neck

"Cute. I mean you have to fix this fast" I said

"Okay okay, in the mean time could you take care of him"

"Sure, why not. I'm already in this mess" I said

"Thank you so much" Hanji says and leaves to her lab

I was still holding Eren in my arms

"I guess its just you and me" I said to Eren and he smiled at me "cute"

I was walking carefully trying to hide Eren so people won't see him until we finally got to my room

"Now what should we do? I don't have any toys so I'll probably have to go to out to buy some. . . mmm"

Eren was squirming around so I let him down, he quickly jumped on top of the bed

"You're tired" I asked him and he nods

I tuck him in my bed and he falls asleep, I hear I knock on my door and panic

"Hey, (Y/N) are you there?"

"A-armin is that you" I asked

"Yes can I come in-"

"NO! I mean no you can't"

"Is everything alright?"

"Y-yes everything is peachy"

"You don't sound fine, I'm coming in"

I put all my weight on the door so he won't be able to open it but somehow he was able to

"What's the matter (Y/N)? You don't seem fine, you know I worry about you" my face starts to burn up

"I-I'm sorry" I look down

He lifts up my head and smiles at me

"So where's Er-"

Before he could finish he spots little Eren sleeping

"(Y-y/n)? Is that Eren?"

I nod and he looks shocked

I quickly grab his hand "Please don't tell anyone, Hanji is already working on a serum to turn him back"

"B-but-"

"Please" I said looking up at him with puppy eyes

His face starts to turn red and he scratches his cheek

"O-okay, I won't tell anyone"

"Thank you" I let go of his hand and close the door and I start to tell him what everything that happened