Marvel One-Shots (Male reader)

The Good Old Days - Avengers

"Y/N move that piece to there. Good. Now, flip that and plug it in, it should work."

He moved to the other side to watch behind Y/N and squatted down to look at the bottom of their project.

"Tony, I can't move this if you are standing behind me. Move!"

Tony stepped out of the way and smiled as Y/N struggled to get the piece unstuck. When he finally did, he carried it to its correct positioning. He set it in place and hit it a few times with the palm of his hand. Once he got tired of how slow it was moving, he grabbed a hammer and pounded it into place. He stepped back and threw the hammer onto the bench, then he wiped sweat off his forehead.

"Alright. Plug it in."

Y/N maneuvered his way around the machine and plugged it in. It slowly started to hum to life and the two men stood next to each other. They turned to each other and smiled, then embraced in a hug.

"We did it Tony. We finally did it."

"Yeah, we did. It turns on, but does it work?"

"Let's see."

Y/N walked in front of it and put on a welding helmet to protect his eyes. He gave Tony a thumbs-up as he activated it. A bright green light flashed from the side Y/N was on and the machine sent out an extremely loud crashing noise from inside.

"Turn it off! Turn it off!"

Tony stumbled to his feet and pulled the emergency release lever, immediately dulling the hum of the machine.

"Y/N are you okay?"

Tony pushed his way around the machine and saw a teenager laying on his side. He groaned and fell onto his back, then rubbed his eyes.

"I think I'm oka-y. Oh my god, why did my voice just crack."

Y/N sat up straight and looked to Tony. He tried his best to hide his laugh and to keep a straight face but was failing dramatically.

"Tony. What the hell happened?! What's so funny?"

Tony grabbed his phone and took a picture of the teenaged version of Y/N and made sure to save it to his private database before showing him.

"I think it worked, but it went back to far. You're a teenager now."

Y/N stood up and walked to his desk. He grabbed a mirror and inspected himself with his mouth open. He sat the mirror back onto the table and stared forward with a blank expression.

"This wasn't supposed to happen. Tony, it was only supposed to go back a few years. Not 20 dammit!"

Bruce and Thor walked into the lab.

"Hey Tones, what was that loud- Who is this?"

Y/N gave Tony a pleading look and put his arms out with his arms up.

"It's Y/N! Our damn project went back too far and turned me into a teenager!"

Thor smiled amused and Y/N sent him a glare that wiped the smile off his face.
He may have been a Midguardian, but he was a damn intimidating one.

Bruce looked back and forth between Tony and Y/N trying to process the problem in front of him.

"So, this is why I wasn't allowed in the lab for the past month?"

Y/N and Tony both nodded. Bruce dropped his head in his hand.

"How long is this supposed to last?"

"We programmed it to last for an hour for now. If we screwed up how far back to go, who knows what else we screwed up."

"I swear if I have to go through puberty again, I will choke you to death. I have a kid to take care of!"