Experiment OBA ~Levi x Eren~

*AUTHOR NOTE: The cover isn't mine, all rights to the owner. I would credit them, but I dont know who made this. I will change the cover with my own soon, but a lot is on my plate with homework and projects, so sorry if uploads aren't as frequent as I would like to.*

*WARNING: This fan fiction will include yaoi (boyxboy), fluff, smut (not sure if I will put any in), strong language, and Ereri. If you are sensitive to these topics or are here to hate, then please do NOT read this. Thank You.*

One day, Eren was sitting in the dinning hall with Levi. Eren was talking to Levi when SLAM! Hange bursted into the room, leaving Eren surprised and making Levi pissed off. Hange asks Levi and
Eren for a little request of hers. She asks them if they can try out this new serum for one of her research projects. Levi obviously didn't trust Hange one bit, but agreed as long as it didn't hurt either of them. They went to Hange's office and injected themselves with the serum. What will this "experiment" do? What will happen next? *P.S: It gets more exciting, trust me people!*