Sir?

A new recruit.

Levi walks into the dull coloured room, takes up position next to the window to watch the training in the courtyard.
"Tch."
He clicked his tongue and turned away, leaning gently on the windowsill.
A harsh rap at the door and he exhales deeply before grumbling. "Come in!"
The door creeks open slowly, the heavy wood dragging at its hinges, to reveal a recruit he knew all too well yet they had never spoken. 
"What is it, Jaeger?" His tone was tired, as though he couldn't be bothered with this interruption.
"Hello sir," The boy saluted Levi, "I've come to inform you that I've cleaned the top floor and prepared all the rooms like you asked..." his timid voice faded out as Levi lost concentration for his eyes began to wonder over the boys frame, slender yet toned but taller than him, this irritated Levi for an unknown reason to even himself.
"...and so I was told I could be free of duties this afternoon if you allowed it..."
Levi continued to faze out of the conversation, his eyes trailed over the boy as though he was reading a book. Eventually they crept back up his body and rested on his lips, still moving as he spoke, before he interrupted.
"Eren I need you to clean the stables this afternoon, there's no one to do it until the weeks end."
The boys hopeful expression dropped slowly as he realised he'd be working all day, he immediately dipped his head and turned to leave before Levi stopped him with anger in his voice.
"Where are you going!?"
His demand was harsh and caused Eren to flinch.
"You told me to clean the sta-" His sentence was cut off, "Did you not pay attention? I said this afternoon," Levi's tone caused a shiver down the boys spine as he continued to spit the words, "right now you'll go and scrub the toilets."
Eren's heart was racing as he backed away, "Y-yes, s-sorry sir!"
At that moment Levi realised Eren was trembling and so he exhaled and murmured, "Get out of my sight, Jaeger."
Eren immediately backed out the doorway and pulled the door so fast that it slammed.
Levi shut his eyes and sighed as he heard the boy stuttering apologies whilst scampering down the hall.

After an hour or two, Eren found himself standing behind the corporals door, afraid to interrupt him again but wanting to keep him updated.
He flinched at Levi's voice as he shouted, "Are you going to stand there all day!?" and so he quickly pushed open the door and stumbled in.
"Sorry Sir! I've scrubbed the toilets and washed the floor, walls and windows.." he gulped before adding, "will it be okay if I took a break now, Sir?"
Levi's cold stare pierced through Eren and made him regret those last words.
The older man asked him to close the door and come in, Eren did as he was told and walked over to Levi.
Before he could react, Levi grabbed the boy and forced him against the bookcase, holding him by the throat.
Eren cried out as his back hit the shelves, he held onto Levi's arm with both his hands as he tried to push the man off of him.
Levi's grip on the struggling recruit grew harder until Eren gagged.
"I don't know what it is, Jaeger but you really piss me off."
The boy clawed at Levi's hand in a last attempt to loosen his grip, it merely made the mans grip tighten.
"P-please stop!" Eren choked, "I can't... breathe..." his voice couldn't shout any longer and he began to feel weak, his attempts to free himself were now feeble as his hands merely stroked his Captain's. Levi grips harder until Eren gags.
"No! Stop-" His cries were muffled as Levi drops his gear and placed a hand over the boys mouth, pressing down so he couldn't turn away.
As Eren's eyes began to water, Levi loosened his grip on the boys throat and drifted his hand downwards, passing his abdomen. His fingers gently stroked the defined muscle through the squirming recruits shirt as he continued towards Eren's groin.