Eren yawned and turned over, his limbs tangled in the sheets, his hand reaching forward and feeling along the mattress for the captain. The boy blinked and raised his head from his pillow and looked groggily around the master bedroom, not a soul in sight, let alone Levi's. Eren sighed and raised his arms rub the heels of his palms against his eyes, groaning as he sat up. His entire body was stiff and sore, his muscles tight, and his bottom very tender.

The boy shook out his hair and slipped off the bed to crawl tiredly over to the mirror by the bureau, turning around and looking over his shoulder to inspect the captain's work from last night. The small welts were gone at least, but the skin was still red and a little inflamed. Eren wrinkled his nose and pushed out his lower lip as his eyes scanned his body, his finger moving toward his backside to prod the skin cautiously, a grimace distorting his face as he snatched his hand away quickly. He really did owe it to himself to stay out of trouble. For his behind's sake at least. But Eren had done what he had to do, it just happened that Levi had been disrespected in the process. It was Commander Erwin's fault, not Eren's. Not by any means. Either way, the boy lowered his eyes and stared warily at his bottom; it would only be beneficial for him to keep his nose clean for now.

Eren blinked however, his gaze shifting to the large wall window on the other end of the room, a series of grunts and growls seeming to sound from outside. The boy padded slowly to the window, his nose pressing against the glass as he looked down to the garden, his eyes blowing open wide in an instant. Eren chewed his lip, awestruck as his eyes followed Levi's movements, the captain sending quick jabs at a sack of sand hanging from a low branch of the young willow in the garden's center.

The captain swung his leg fiercely at the bag, snarling as it connected before sending his fists raining down against the sack without a second to spare. Eren pressed himself closer to the window, his hands unconsciously balling into fists as he stared down at Levi, the morning sun bouncing off the captain's sweaty back, his skin seeming to glimmer. The boy wanted to see more, Eren wanted to watch the captain up close, fighting just like that. He was almost salivating, his heart was fluttering as he watched Levi's muscles twist and flex, the dull thud of the captain's fists against the sand bag sending wonderful tremors buzzing between Eren's legs.

But the boy halted a moment and shook out the thoughts creeping through his mind, the thoughts of Levi sending his hand down on Eren's behind with the same force he was using against the bag at this very moment. Eren shuddered and hushed away his fantasy, as twisted as it was considering the pain his bottom was currently in, and set his jaw before he scampered back to the bedside drawer and fished his collar out from within it. The boy took the collar gently in his mouth and crawled as quickly as he could out the room and down the stairs, his teeth sinking slightly into the leather as he slipped through the kitchen door to the garden.

Levi paused and panted, his balled fists lowering from his face and unraveling to sit skeptically on his hips as a pair of wide eyes appeared slowly from beneath the large bag of sand he had been training with a minute ago. "Well, it looks like someone decided to wake up early…"

Eren nodded and inched forward, his gaze respectfully lowered as he dropped the collar from his lips before the captain's taped feet.

"And someone even brought over his collar like a good boy…" Levi tutted in slight amusement and dropped down to squat before Eren, his fingers feathering over the skin of the boy's neck as he buckled the collar, Eren's lips trying to bar in a small whine. The captain's nostrils flared and his eyes narrowed, his forefinger turning up the boy's chin to get a good look at him. "What is it, Eren? Your naughty little backside still sore?"

The boy furrowed his brow and crawled forward to bury his face in the crook of Levi's neck, the smell of the captain's sweat and cologne making Eren's head spin, his eyes slipping shut as he breathed all of Levi in. "Eren, I'm talking to you," the captain said sternly, pinching the boy's ear, Eren wrinkling his nose as Levi pricked him. The boy, however, said nothing, settling only to press himself closer against the captain's slick skin, his body flushing and his heart quickening as he dared to flick his tongue out against Levi's jaw.

"Oh, I see…" Levi nodded, patting Eren's rear and giving it a hearty squeeze for good measure, the boy squeaking and arching his back, "I've got a puppy who wants to play, don't I?"

Eren nodded keenly into Levi's chest, his arousal blossoming as the captain's voice cooed low and soft in his ear. "Yes, sir, remember you said, you said a few days ago I could play with you all I wanted if I behaved during training?"

"That may be so…" Levi mused, idly twirling a lock of Eren's hair around his finger, ignoring the insistent whimper the boy let out, "But I must say you gave me quite a bit of trouble last night."

Eren chewed on his bottom lip, his eyes shifting guiltily away at the captain's words. There was no denying it at all, the boy grimaced, he definitely hadn't made it easy for the captain to get a good swatting in. "I didn't mean to," Eren whispered sadly into Levi's collarbone, "I just don't like getting in trouble, daddy..."

"Well, whose fault is that?" Levi murmured venomously, pulling Eren sternly away from his chest to demand his gaze, "Did I ask you to disrespect me in front of Commander Erwin? If you didn't want to get spanked, you shouldn't have misbehaved, pup."

The boy stuck out his lower lip in a pout and knotted his brows as he turned his eyes down stubbornly. "But I feel bad when you get mad at me…"

Levi's eyes widened for a split second and his mouth parted slightly before his face became stony again as he lifted Eren's chin up gently, his thumb grazing back and forth over the boy's cheek. "You shouldn't feel that way, precious. I spank you because I need to teach you to be a good boy," the captain said softly, his voice coaxing Eren slowly out of his mood, the boy eventually scooting closer until he was nestled once again in Levi's chest, "I get mad at you because I love you. You know that, don't you?"

"…Really…?"

"Yes, pup," Levi nodded, stroking his fingers through Eren's hair, "You must learn that every single time I discipline you, I'm doing it to teach you, to make you better, to show you right from wrong. You should be happy when I spank you, you should be thankful for the love I show you when I spank you." The captain paused and tilted his head, puckering his lips in wait before Eren touched them chastely with his own. "Do you understand now, pup?"

"Yes, daddy," the boy sniffled, plopping his chin on Levi's sweaty shoulder, "I really am sorry…"

"Apology accepted, Eren," Levi grunted, rising to his feet and shifting the boy in his arms before he trudged through the grass towards the door to the kitchen.

"So…" Eren's eyes shifted, his tongue darting out to lick his lips as he held tight to the captain, "we—we can play now, right? Now that I said sorry?"

"No. After dinner."

"But, sir!" Eren cried, sprawling his hands over the captain's chest as he marched up the grand staircase, "I want to play now!"

"Oi, you raise your voice again, and you won't play at all," Levi said stoically, unaffected by the copious pouts and sniffs Eren was producing, "Now let's go get us a nice bath, God knows we both need one."

Eren knotted his brow and grumbled under his breath, his nose crinkling in agitation as he watched Levi fold his clothes and place them neatly into the hamper. The captain really was taking his jolly time to get into bed, much to Eren's annoyance. He had been waiting all day, waiting and watching and wanting, Levi teasing the boy relentlessly time after time. A hand grazing Eren's inner thighs during breakfast, a low whisper, hot and sweet in Eren's ear during lunch, a soft clap on the behind during dinner. It had driven the boy mad, Eren was positively itching, his body was aching, exhausted almost, from lusting over the captain all day.

"Sir, please! You're taking so long!" Eren whined, kneeling on the mattress, his hands clutching tightly to its edge. The boy hissed and huffed as Levi sauntered to him, a spark in his eye as he pinched Eren's cheek teasingly.

"Alright, alright, pup," the captain droned lazily, slumping onto the bed and situating himself on his back before he reached wearily out to Eren. "Come here you impatient little imp."

The boy drew in a quick breath and shook his head, his gaze firmly set on Levi's face. "Wait, sir. Remember you said I could play with you however I want. Right? Right, Captain?"

"Yes, pup," Levi sighed and pointed to the middle drawer of the bedside table, "but first, I have a little something for you there."

Eren blinked for a second before he all but lunged at the drawer, pawing through it feverishly until he withdrew from it a velvet box laced together with a satin bow. The boy quickly found his place back to straddling Levi's hips and shook the box gently as he placed his ear to it, his brow creasing as he thought of the possibilities.

Levi closed his eyes wearily and drew his arms up to cross them beneath his head as he yawned. "Open it, pup. Let's get on with our little play date so daddy can go to sleep. He's exhausted from training today."

Eren hastily untied the bow without a word, his eyes widening as he removed the box's lid. The boy tilted his head to the side in bewilderment, this was unlike any object he'd ever seen, anything he'd ever known. His gaze washed over the gift in confusion, over the glass piece, tapered at the top and wider at the bottom like some sort of cone, and over the long expanse of bushy brown fur that sprouted out from it. "Sir, what is this…?"

Levi pursed his lips, the smallest of smiles managing to break through despite his efforts. "That's your new tail, Eren."

"My…tail?"

The captain opened his eyes and reached a lazy hand slowly onto Eren's thigh, stroking the smooth skin. "Puppies do have tails, don't they?"

"Yes, sir…" Eren paused, his stare lowering from Levi's face to study the gift more closely. His heart was fluttering, his body heating up as he stared down at the smooth blown glass, not wider than maybe three of the captain's fingers. And if Eren didn't know any better, he would say that that piece of glass would be taking the place of those fingers. And god, how he wanted it to. He would wear it every day, he would think of Levi, of how it would make him feel so full, how it would make him feel like the real pet he knew he could be for his captain. "Yes, yes, they do have tails!"

"Well then, I think you know what to do, pup," Levi whispered, his forefinger curling slowly to beckon Eren towards him.

Eren didn't need a second more before he was turned around and on all fours, his backside hiked open and ready just above the captain's face, his moan immediately breaking the silence in the room when a pair of hands pulled his rump down and spread it for the warm tongue nudging gingerly against him.

The boy's cheeks flushed under Levi's hands and the tiny hole puckered and tightened against the captain's tongue. Eren scrunched his eyes shut and reveled in the velvety feel of Levi devouring him, the steady lapping of flesh against his skin driving the boy wild. Eren sighed and rose up onto his knees, wriggling his behind and bearing down onto the captain's lips, Levi's hands sinking into the round flesh of the boy's backside to spread it wider.

"Hnng—sir—love—I love when you kiss me there—."

Levi smirked and lifted his head up off the pillow, his tongue straining against the rosy entry until he managed to prod the tip inside, a sharp intake of breath sounding instantly from Eren's lips.

"Please, daddy—," Eren panted and rolled his nipples beneath his thumbs, pinching them and tugging at their rings until the little mounds grew pink and swollen, "inside me—."

The captain tutted into Eren's skin, the steady click of his tongue against the boy's puckered mouth sending tremors up Eren's spine. But nevertheless, Levi brought his index finger down, tracing the line between the boy's cheeks until it found the small ring of muscle and made to wiggle inside. Eren squeaked and clenched unconsciously around Levi, but the captain was persistent, eventually breaking through into the boy's body. Eren gave a cracked groan and fell forward, burying his face in Levi's groin, his lips sucking feverishly at the bulge through the captain's nigh shorts.

Eren palmed the captain and nudged his nose beneath Levi's waistband and into a patch of thick black hair, breathing in the man's musky scent, his eyelashes fluttering before he pulled the fabric hastily away to expose Levi completely. It was Eren's turn now, he would make his captain feel good, just as his captain had always done for him. The boy breathed out through his nose and wasted no time, his lips circling around the head of Levi's arousal, his tongue slathering it with saliva before it disappeared into his mouth.

Levi grunted as a warm wetness enveloped him, his hips rising up as Eren sucked diligently at him, the boy's slurps and mewls coaxing the captain to force another finger past Eren's taut entry. The boy immediately arched his back and gasped around the swollen length in his mouth, thick strings of slobber pooling on Levi's belly as Eren stretched his lips open wider, his throat taking more and more of the captain in.

"Daddy—I—," Eren pulled his mouth from the captain's length to speak, but his words cut off and his eyes rolled as his body rocked with the force of Levi pumping his fingers within him, the steady motion in and out, the prodding and stroking causing the boy's mind to go hazy. Eren's eyes were watering, his thighs trembling as Levi tickled him from the inside, the captain spreading and twisting his fingers about as Eren's hips bucked and stuttered.

"Give me the tail, Eren," Levi ordered huskily, the boy jumping to do as he was told. The captain turned it over in his hand and spat onto the glass piece, rolling it against the orifice between Eren's legs, his nostrils flaring as the boy jolted slightly.

"Sorry, sir—," Eren sighed and clenched his fists before he got to grinding against the smooth tip, "it was cold."

Levi grunted and furrowed his brow, spreading the hole open with one hand and nudging the plug in, back and forth as far is it would go, with the other. Eren whined and pushed back against Levi, the rounded point of the cool glass licking at his insides as the captain coaxed it in further and further until a pained squeak halted him for a moment. "Sir, it's too wide!"

"Shh, shh, you just need a little more stretching, pup," the captain murmured, gently twisting and driving the glass against the blushing mouth, Eren's body taking more of it in, seemingly only one millimeter at a time, "now come on, open up, it's almost in."

Eren clenched his jaw and backed up towards Levi, his skin stretching taut against the widest part of the plug until it forced its way quickly in with a pop. The boy's jaw went slack and his face fell into Levi's navel, his breath quick and labored as he adjusted to the intrusion within him, the captain nodding in approval as the pink puckered opening clamped down around the thinned base.

"My, my, that's not going anywhere," Levi mused, awarding Eren's backside a hearty slap, "now wag your tail, Eren, that's my good boy."

Eren wiggled his bottom eagerly, delighting at the weight of the glass inside him, as well as the soft tickle of fur against the backs of his thighs. "Captain, this—this is the best gift ever! It feels like your fingers are inside me right now!"

Levi pursed his lips as his eyes followed Eren's swaying bottom, the erection between his legs pulsing just beneath the boy's chin. "Eren, turn around. Face me."

"What is it, sir?" Eren quipped, swirling instantly around to crawl onto Levi and rest his chin on the captain's chest.

Levi brushed Eren's hair slowly away from his forehead, his eyes glazing and flashing. "You really do like your present, don't you?"

"I do, daddy, of course!" Eren cried happily, wagging his backside again, his groin rubbing shamelessly against Levi's in the process, "It makes me feel good inside!"

"Hmm, is that so," the captain breathed, his thumb toying with Eren's lower lip, the boy immediately latching onto it, "then I think it's time you return the favor."

Eren nodded and scuttled off the captain without a word before he settled to crawl between Levi's thighs, the boy's lips rosy and parted wide in wait. He would do his best, Eren would prove to the captain how grateful he was, how much he loved the captain, how much he would do anything for him. The boy closed his eyes and lolled out his tongue as the captain guided his length into Eren's mouth, Levi threading his fingers through the boy's hair to lower his head gently down. Eren focused and knotted his brow, breathing evenly through his nose in the effort of willing himself not to gag around Levi, the captain's arousal already prodding into his throat.

The boy relished Levi's quiet pants and drew his lips back up along the captain's length, sucking at the skin as he withdrew, leaving the captain's manhood coated and glistening with saliva, a shy smile curling Eren's mouth as he stared up at Levi. "I've been practicing on my fingers, sir, every night before I go to sleep."

Levi's tongue snaked out to lick his lips before he thumbed Eren's mouth slowly back open. "Show me more, sweetheart."

The boy gulped in a breath of air and descended back down to his work, slurping and lapping at the throbbing organ, his tongue wagging and curling along every inch of skin. Eren mewled around Levi, the captain taking the boy's jaw in hand and angling himself inside Eren's mouth to rub his engorged head against the soft inside of the boy's cheek. Eren slobbered around the captain, his lips fighting to open wider as he brought his mouth down to the very base, the boy's nose burying in the hair surrounding Levi's arousal. Eren's face flushed and his eyes began to tear up, a firm hand in his hair securing his position. The boy couldn't help it, his throat closed up and constricted around the captain, his stomach turning as Levi lifted his hips higher up into Eren's lips, his grunts growing more persistent.

Levi hissed, ignoring the desperate whimpers rumbling in Eren's throat as the boy gagged and coughed against him. "That's it, pup, deepthroat daddy so he can come for you."

Eren squeaked and nodded feverishly, eliciting a low groan from Levi, the captain's restraint breaking as he began driving his length furiously back and forth into the boy's mouth until he pulled himself out suddenly from between Eren's lips. "Turn around and open your ass, Eren," Levi barked, the boy panting heavily as he followed the order, his backside spread and hiked up at the ready.

Levi wasted no time and yanked the tail out from between the boy's cheeks, Eren giving a loud yelp as it stretched him abruptly on the way out. The captain gritted his teeth and pumped himself feverishly with one hand, the other clutching at Eren's backside to bring it down towards his length.

"Sir, what—!"

"Quiet, Eren!" Levi snapped, his nostrils flaring as he aligned the throbbing head of his length with the boy's pinked opening, a long sigh breaking his lips as he emptied himself into Eren's body, the boy trembling and gawking at the captain from over his shoulder.

"What a good boy, drinking up daddy's milk with that sweet little puppy cunt, that's it…" Levi breathed, taking the tail and rolling the glass plug against the orifice before sliding it back snugly inside, "now you can go to sleep, so nice and full of come…"

Eren shuddered as the sticky wetness slid along his insides, barred in by the tail, and whirled around to pounce onto Levi's lap. The boy dug his face into the captain's neck and squeezed his eyes shut, his arms wrapping as tightly as they could around Levi's shoulders. "I love you, sir! I always want to be filled by you, sir, I love you, I love you, I love you!"

Levi's sharp gaze softened for a moment and his breathing steadied before he shook his head and settled to lay a kiss on the boy's hair. "I love you more, pup. Now let's get some rest," the captain said softly, lowering himself onto his back and pulling the covers over he and Eren, "if you're good, I might let you play with me again tomorrow."

Eren nodded and nestled comfortably against Levi's chest, his eyes slipping shut and his thumb sitting snuggly within his mouth. "I'll be good, daddy… I promise."

To Be Continued :)