Chapter 1.

Captain Levi was supervising his squad's the daily chores. While some members cleaned the barracks, others were out getting firewood. He was assured that most of the time, his subordinates did a pretty good job; every one of them except for one… so he went to personally check on him.

"Hey, Eren! How many times do I have to tell you? Don't leave the floor wet, are you stupid or…"

Levi couldn't finish the phrase and two loud screams could be heard in the castle's hallways. The first one was, perhaps more bloodcurdling than the second; there were few the occasions when the Captain yelled, and when he did it was only to order people around or scold someone, but this time his scream was different from any other heard before. It was something between anger and scare, but the most shocking thing about it, was that it was quieted all of a sudden, as if someone or something made him mute. The second yell was made by a terrified boy "Captain Levi!" and then a bucket falling was heard too.

It was all quiet for the next moments, but then steeps coming from the stairs were heard. Someone was running towards the place where the screams came from

"What's going… aahh!" a female voice came from the other side of the hall.

"Petra, you have to help me!... I really think I messed up this time " she came closer to Eren, who was crouching next to the Captain.

"What happened? How…?"

"I was cleaning the floor. It was still wet when Captain Levi came and… he slipped. It was my fault!" his voice was evidently anguished.

"Calm down" she kneeled and observed the man lying in the floor. Then, carefully she put a hand on his neck to find the pulse, fearing for the worst, but almost immediately she sighed with relief and the lump in her throat disappeared "don't worry, he's just unconscious… but he will be furious when he wakes up- Eren gulped after hearing that and seeing the girl's reproaching gaze on him. Some sweat drops appeared on his forehead "looks like the fall was pretty hard, I've never seen him like this and… there's some blood in his head" Petra looked at her bloody fingers as she held the Captain's head with the other hand.

"Do you think he's alright?" the boy asked, very worried and then Hanji appeared in the stairs.

"What happened? I heard some screams and… gosh!

"A little accident, Hanji…" Petra turned to see her with a concerned look but she tried not to worry her too much. After all, they still didn't know how bad the situation was.

"We have to take him to the infirmary… allow me" the squad leader opened one of the hall's doors and took out a stretcher "it ill be easier to carry him with this. Petra, keep holding is head, Eren, take his legs and I will grab his arms ready? 1…2…3."

Being 3 of them, it's wasn't difficult to carry him and once he was in the stretcher he was taken to the second floor, where the infirmary was and he was put in one if the beds. Lucky for them, the last expedition took place more than a month before, so there were no injured soldiers in the medical wing. Once it was all set, Hanji took care of the injury in the head and Petra helped, since Eren was too nervous to do something useful, so he saw the whole process from one of the corners of the room. It was small, but it required bandages.

"Now we only have to wait until he wakes up" Hanji made a pause and looked at her colleague "to think that this grumpy man is also capable of having an angelic expression."

"Eh, Hanji… the Captain's not asleep, he is unconscious… " Eren sounded mortified while Petra held back a small laugh after hearing the scientist and her eccentric comments.

"Come on Eren, relax a little. It's Levi we're talking about. He can't be THAT hurt after a simple slip." The squad leader took off her glasses and cleaned them, but suddenly her expression changed "Right! Someone has to let Erwin know. Petra, could you go and tell him about the accident?"

Petra nodded and left the infirmary to look for the Commander, while her face showed some worry. She thought about the memories since the moment she joined the military and she didn't remember seeing the Captain having an accident like that, much less unconscious and, somehow, vulnerable. On the other hand, her nervousness grew even more because she had some repressed feeling towards her superior, the kind of feelings that could betray her when she was alone with him and that made her anxious when she saw him. Despite that, the girl made her best efforts to suppress and deny them. It wasn't the right thing to do for a member of the Scouting Legion, and it wasn't professional at all. Nevertheless, once in a while, Petra allowed herself some time for her mind to wander and imagine what could happen if they were in a different situation. She did it during the nights before expeditions or after a rough day, when she found it hard to fall asleep. It was way to relax and going to sleep with a smile in her face.

In that moment, the girl became conscious of her thoughts and shook her head to cast away those thoughts, hurrying to get to the Commander's office. Meanwhile, the situation was the same with Hanji and Eren, but the scientist took out from the closet what it appeared to be as a hip flask, just like the one Pixis carried all the time.

"Hanji, I don't think this is the best time to be drinking" the boy was sitting in a bed next to the Captain's, worried about his superior and the awful scolding waiting for him as soon once he woke up. Who knows what kind of punish would he receive for it and there was a possibility that the Captain would beat the hell out of him.

"Oh, this? It's not for me." she took a handkerchief and dropped some of the liquor in it "the smell is strong and it might just wake him up faster" she put it near the Captain's nose, and he moved his head right after smelling it "see? It won't be long before he wakes up."

A few moments later, Commander Erwin entered the room with steady steps and carefully examined the room with his eyes. Petra had informed him about the details of the accident and after considering it on his way to the infirmary, his expression was serious and looked askance at the soldiers in there, as if he expected them to have new information, but they didn't, so he only said.

"Soldier Ral just gave me a report, saying that Levi had an accident and he slipped. I assume he hasn't woken up." he approached the bed and Hanji "any news?"

"I think he will wake up any time now" she put the handkerchief next to his nose again and Levi moved again, but this time he complained "looks like he is in pain." The Captain kept moaning until he started to open his eyes and move his fingers.

"Look, he is…" Eren's face lightened. It would have been a great burden for him to carry humanity's strongest soldier's death on his back or putting him on a coma. He didn't even want to imagine the consequences of such thing.

"At last! Levi, can you hear me?" Hanji got closer to his comrade, touching his shoulders, while he tried to focus his eyes and kept complaining.

"Who the hell are you?" Levi saw her with distrust and anger, but there was something different in his expression. Something hard to explain, but it made him look different, as if he was a different person.

"What? Stop joking around. It's me, Hanji. You know me."

"He is a Little confused, that's all. Let's give him some space" Erwin took Hanji's arm to move her away "how are you feeling, Levi? Does your head hurt?" The confused soldier sat on the bed, grabbing one of the blankets to cover his face and he shrugged, as if he was trying to protect himself. His face showed that something was hurting him as he rubbed his head.

"What do you care, idiot? And where am I?" Levi looked around "this can't be the underground city… " he pointed when he saw the sky through the window and in that moment Erwin's expression changed and looked terrified, while the other two soldiers looked as confused as the Captain.

"I wonder if… ? Levi, do you remember what happened?" Erwin approached cautiously "Do you know where you live?" there was no answer from the black haired guy, who only looked down and clung stronger to the blanket.

"He looks very disoriented"

"I'm afraid is more than that, Eren. It's like… Levi, tell me how old are you?" Hanji's attitude became serious and crossed her arms "Levi, how old are you? She approached him a bit more and spoke sweetly as he looked at her with suspicion. After a moment without an answer, she added "It's ok, don't worry, we are not going to..." she was interrupted by Oluo, who all of a sudden entered the room.

"What happened to the Captain? Is he alright? I came as soon as... oh! It's good to see you are awake, sir! "Levi looked at him and ignored the rest of the people there "I thought you we…." Oluo bit his tongue and some drops of blood scattered all over his face.

Levi laughed so hard, hugely surprising everyone in the room. They were even more worried now. A reaction like that wasn't like him at all. It was as if he was someone else and everyone's blood froze, making the atmosphere even more tense.

"What the…?" Eren started to sweat and Petra entered the room again, still worried about the accident but hoping to find some good news.

"It there any…? Oh! It's good to see you back!" she smiled widely and Levi stared at her, smiling. It was as if he unexpectedly relaxed "Captain, are you alright?" Petra was very confused after seeing his expression. Although, on rare occasions she had been lucky enough to catch a glimpse of a tiny smile on her superior's face, he had never shown a complete smile.

"Levi, please tell me how old are you?" Hanji insisted with the question, as everyone else in the room kept wondering what was going on.

"Seven" he said carelessly, with eyes still fixed on Petra and smiling. Then he finally took the blanket from his face.

"This is worse than I expected." Hanji left herself fall into the bed, next to a speechless Eren.

"Some kind of amnesia?" Erwin was serious and Oluo shocked "Levi, listen to me… I'm Erwin. You are not seven years old. You are a Captain in the Scouting Legion, as well as humanity's strongest, you kill titans and…"

Levi looked at him with skepticism, as Erwin kept with the speech. Some images appeared in his mind started to spin around, making him even more confused. It wasn't long before he shouted in agony and cried, his hands covering his ears, leaving everyone even more overwhelmed.

"Perhaps that wasn't the best approach, Erwin. If he thinks he is seven years old…" Hanji frowned as she looked at the door, worrying for the possibility of someone else seeing the scene.

"Easy there, it's alright." Petra got closer to Levi to comfort him "shh, shh, it's ok. There's nothing to worry about." It seemed like she was talking to a little boy and she even caressed his hair with a kind gesture and then he began to calm down, looking at her with eyes full of tears.

"What the hell?!" Eren couldn't believe his eyes and he was even more impressed with the Petra's actions and the Captain's response to them. A similar intrigued expression appeared on Hanji's face.

"This I something I never thought I'd see…" Oluo couldn't believe what he was seeing.

"Everybody, calm down. We need to think" Hanji stated "Levi was walking though the hall and he slipped" Eren gulped as he remembered why he fell on the first place "he hit his head and was left unconscious. Then, he woke up very confused." There was silence for a moment and they looked at each other with serious expressions "this is probably a strange case of amnesia."

"Strange case of amnesia? Just like that? Don't you think this is something more serious?" Oluo pointed at Levi, who was grabbing Petra's shirt; she wasn't wearing the jacket. "It's more like a serious case of… whatever it is!"

The scene was very surreal, and the one who appeared to be least affected, or at least wasn't aware of it, was the Captain. Everyone else were concerned and feared for the worst. What would happen if he didn't come back to the way he was? What if the damage was permanent?

"Hanji, is it possible that he has a regression to his childhood?" Erwin had been silent for a while, trying to make any sense of the situation.

"Apparently, quite possible. I doubt he's playing us some joke." she laughed hysterically to hid her nervous."

There was an awkward silence in the infirmary and only the agitated breaths of the soldiers could be heard. The temperature raised, not because of the weather, but for the uncertainty around the respectable Captain.

"Stop looking at me like that! Don't you have something better to do? You useless Military Police assholes!" Levi complained.

"Captain, we are not from the MIlitary Police… we are from the Scouting Legion" Petra showed him the insignia on Hanji's arm and Levi looked terrified

"So, you are also…?" he shrugged again and covered himself with the blanket.

"Enough!... we need to talk. Eren, stay with him for a moment."

Erwin left the room followed by the other soldiers, but not before noticing the terrified expression on the young soldier. Eren had never been good with kids, if that's what this was all about and besides, he didn't have a good relationship with the Captain either, but he did as he was told. Deep down, he felt guilty.

Once they were all outside, the headed towards one of the hidden corridors in the caste to analyze the facts and organize a plan. In the end, they decided that it would be better to let the Captain rest; there were no known medicines for amnesia. Luckily for them, at the moment, stationed soldiers were a few, so only a handful of people would see the peculiar state of Captain Levi.

"We will be checking on Levi's condition every day, but the Special Operation's Squad will be the one in charge of him. Apparently Petra has the best odds on approaching and dealing with him. Try not to importune him until he's calm. We don't know how he might react- He could get violent, and despite of what he believes, his strength is not the one of a seven years old kid."

"Commander… you knew Captain Levi before he joined the Survey Corps, right?" Petra waited for Erwin to nod before continue "do you have any information that could help us to… well, to know what to expect from this?"

"I met Levi around seven years ago. His childhood circumstances are unknown to me. But as far as I know, he always lived in the underground city, underneath the Capital."

"So, is it true that…" Petra stopped talking to avoid revealing information regarding the Captain, so Oluo or Hanji didn't ask any more questions, but then a loud crash was heard from inside the infirmary and they expected something really bad was happening.

In a matter of seconds, they all looked at each other with wide eyes and hurried to open the infirmary door. There, they found Levi on top of Eren, beating him with hard punches, surrounded by first aid materials that fell from the drawers.

"But what…? Levi, stop right now, this is an order" the Commander yelled.

"Go to hell!" the Captain kept punching the young soldier, who tried to defend himself by putting his arms in front of his face. He wouldn't dare to punch him back, despite his condition.

Quickly, Oluo and Hanji tried to separate them, but Levi was too strong and they could only stop him by grabbing his two arms. His strength was still the one from humanity's strongest, but his behavior was the one from a seven years old kid.

"Are you alright, Eren?" Petra kneeled next to the boy and helped him stand up "what happened?"

"He seemed to be very calm, when…" he had a chill down his spine when he noticed the harsh look on the Captain's eyes on the other side of the room. He was still struggling to get away from Hanji and Oluo's grip.

"Go on, Eren." Erwin crossed his arms and stood in front of the young soldier.

"Commanders,,, well, you see, he seemed to be very calm and suddenly he stood up. He approached the desk and took the hip flask. Apparently, he was curious and I told him it wasn't a good idea to grab it, but he didn't listen and when he was about to take a sip, I grabbed his arm. Then, he attacked me."

"You damn snitch! I'll kick your ass when I have the chance!" Levi was very angry and Ern could only look at him with fear.

In normal situations, the Captain managed to intimidate Eren, but in that moment, he was sure he would be attacked as soon as Levi saw a chance. As for Erwin, he sighed with frustration and looked at his subordinate for a moment, before looking at the rest of the soldiers in the room.

"Unfortunately, I have an important meeting in the capital, so I cannot stay to deal with this situation," he felt a terrible headache approaching "I'll have to leave it in your hands, at least for today. I hope this amnesia deal is temporary."

Erwin looked at everyone in the room again, and then at Levi, who glared at him, just like the first time he met him, and suddenly he had the urgency to hurry his return to the barracks. He knew very well what his subordinate was capable of, and he didn't want to imagine the problems he might cause, but for the time being, everything would be in the hands of the Special operations squad.

Author's notes.

Hi there! This is my new story. I hope you like it. It won't be very long, but it will be fun and interesting. The idea of Levi having a regression was quite interesting and I think it was lots of potential for rivetra!