Looking at yourself from outside of your body must have been the strangest situation you could ever be placed in.

Eren was not looking into a mirror and suddenly noticing all of his facial flaws up close, but quite literally he was staring into his own teal-green eyes.

Or rather, at this point it wasn't his any longer. It belonged to none other than Lance Corporal Levi, and the Corporal was now in charge of what Eren's body did.

Levi blinked Eren's huge, doe-like eyes whenever nature planned for it, and Levi walked in Eren's body with Eren's legs. He kept Eren's back straight unlike Eren himself had done back in his own body, and he fed Eren's stomach when he grew hungry.

So how did the two end up in sexal activities like these? From normal, everyday actions to being involved together in a room with a bed, really did say something about their curiosity, didn't it?

However that was't the case. Corporal Levi claimed that this wasn't from curiosity, but it was for experimental purposes. (Eren had said that experiments were the results of curiosity, therefore that was why they were doing this in the first place- but Levi had shut him off with a glare. Eren didn't think he was capable of making such an expression.)

He was now, sitting on top of Levi (his own body to be exact) with a flushed face. He was fully exposed in all his naked glory, and so was the corporal underneath him.

It was definitely a strange thing to see your own body nude from another person's perspective. Eren hadn't even realized his penis curved slightly to the right until he had seen Levi take off his pants off Eren's body.

Eren didn't know what to expect when it was his turn to take off clothes from Levi's body. He had known that Levi was quite well-trained and despite his vertically challenged appearance, Levi was incredibly fit. Eren silently wondered what Levi thought of his body, but before he could even continue on with the thought he was being yelled at.

"Hurry up, shitty brat. Quit touching my body like that, it's revolting." Coming out of his own mouth with the harshness that could only belong to Levi, sounded strange. Thankfully they were both alone. "Your movements are lagging. What, are you savoring this?"

Sometimes Eren wished Levi would be more soft-spoken. But Eren knew better than that. Levi never sugar coated his words, and as cold as it was, it was endearing at the same time.

"N-no sir." Levi's voice echoed in his ear, and Eren could not get used to hearing it leave his own mouth. A stuttering Levi. You never heard that everyday.

"You're wasting time doing worthless shit. I despise wasting time. You could've taken three dumps during the time it took you to take off your pants. Are you suddenly feeling like a baby? Should I take off your clothes for you?"

So... How exactly did Eren end up in this mess?

A few days earlier, Eren had gotten an invitation from Hanji saying to meet her in her office.

He was in his own body during the time, and he had little to no knowledge of the fact that Hanji had also invited Levi over to her office as well.

He didn't even realize that her invitation was strange and a bit abrupt, because he hadn't even considered it. (Looking back, Eren wished he would have been more attentive on the details and decide not to go).

Eren stopped by the doorway- the door was left ajar- to see that Levi was already there. He stood in the far corner with his arms crossed over his chest, his expression its usual: the scowl. He looked displeased about something, and his eyes followed the test tube in Hanji's grip as she flailed about enthusiastically.

"Oh! Eren you're here!" Hanji said, stopping in her passionate speech to Levi to address Eren.

"Oi, shitty four eyes." Levi said, his tone dripping with irritation. Apparently he wanted to get some kind of point across, but Hanji prevented that from happening.

"Come inside, come inside!" Hanji chirped, making hand gestues for Eren to step into the room.

Eren felt hesitant in advancing, suddenly self-conscious about his movements. He was fully aware of Levi's piercing gaze on him, and he felt that if he did something wrong that Levi would not stop to think twice before giving a blow to Eren's head.

"I won't bite you! Come on then, Eren."

Eren couldn't help but feel a bit uncertain about her words. Even Levi looked as if he doubted her, the both of them sharing a moment of common knowledge that the exuberant scientist had more than enough competency to do something as crazy as that.

Finally Eren took a step forward, figuring he might as well do as told because he was invited over in the first place. "I, uh got your letter..." Eren said slowly, becoming wary of Levi's eyes on him. But you never told me that Levi would be here as well!

As if Levi had read Eren's mind, he asked "Why's the brat here? I told you that you're not allowed to stick knives into the kid."

"Good question. Drink this, and you'll find out." Hanji gave Levi the test tube. "And don't worry about a thing! No knives are involved this time."

Once again Eren found it hard to convince himself the opposite of Hanji's words.

"Hell no." Levi glared at the test tube in Hanji's hands.

Hanji didn't put up a fight. Instead, she turned to Eren with the test tube. "Eren, drink this."

"Okay-"

"Don't you touch that shit Eren." Levi cut in, practically throwing invisible daggers into Eren's body with his eyes.

Eren emitted a small, high-pitched yelp and retrieved his hand. "Y-yes sir!"

"Hanji, take your shit alone. No one's going to accompany you so make sure to take a nice, long shit." Levi said with a narrowed gaze. He headed for the door, aiming to leave as swiftly and cleanly as possible.

Hanji was too smart to fall for that. "Here you go, Eren. He's leaving so-"

Before Hanji could carry out her words, Levi snatched the test tube out of her hands. "No experimenting on the brat."

"I thought you were leaving?"

"I am now."

"Nice try, return my test tube."

"No."

"Fine. It's not like I need that one in particular. You can drink that one, and Eren can drink this one."

Levi was silent.

Hanji was grinning.

"What the hell is this damned experiment of yours?" Levi gritted through his teeth.

"There's only one way to find out." Hanji sang, wiggling another test tube in front of his face.

"I'll drink your damned potion but this better not give me explosive diarrhea or some shit."

"Sadly, no."

As Levi brought the test tube up to his lips, Hanji handed Eren a test tube of his own filled with clear blue liquid. She instructed the two to drink it simultaneously, and so to prevent any further trouble they did as told.

Levi finished drinking his share quicker than Eren had, a grimace plastered on his face as he tried to rid of the flavor lingering on his tongue. "What the hell is this anyway?"

"A body swapping experimentation!"

Eren choked on the last bit of the liquid, his eyes boggling out of his head. He nearly dropped the glass, turning to Hanji panic-stricken.

Levi, on the other hand looked a bit more calm but that didn't stop him from looking pissed. "And how long does this last?"

"It ranges from a day..." Eren sighed of relief as Hanji spoke, but she continued. "...to a year."

And now was the right time to carry out with his panic. "A year?" Eren repeated, becoming more worried by the minute. So far, the effects of the potion weren't in toll but there was no telling when it'd start. He began to pace the room, dreading the moment he'd feel his soul slip out of his body and into Levi's. He prayed that Hanji's experiment had been a fail and that he'd only end up having red hair or something like that. Anything but this!

Suddenly, Levi hissed and held his head. He leaned against the wall as his face twisted up in pain. "What the hell's going on, shitty four eyes?" He demanded, his entire body beginning to tremble as seconds ticked by.

"Really? Really, really?" Hanji asked, sounding excited despite Levi's pain. "How do you feel? Like you're being ripped away from reality? Like you're falling asleep?"

Eren didn't have a chance to input on this, because suddenly the world collapsed under him.