Prompt received from Random on FFnet.

Prompt: Great start for the collection! It's awesome so far.

The prompt I thought up is this: eren or Levi suddenly grows animal ears and a tail( you can choose the animal, personally I'm thinking cat) . The one who didn't grow ears playfully teases the other, but when a rub (or scratch or whatever) behind the ear or on the tail draws a small moan out... Things get... Smutty

Lol, have fun!

I will be using they, them, their pronouns for Hanji. This will be set in the cannon universe of Attack on Titan. After the first Levi's Squad was killed. This story is written in 3rd person.


Kitties Like to Play

"How the hell did you manage to fuck up this bad, shitty glasses?" Levi asks, glaring over at a not-very-guilty looking Hanji and an embarrassed and blushing Eren who just so happened to now have cat ears and a tail.

"I may have made a slight miscalculation in my titan experiment." They smile sheepishly at him, receiving a glare in return. He sighs heavily before replying.

"How long will it take you to figure out how to fix it? We can't have Eren like this forever, it could be a distraction to himself and everyone around." He looks between Hanji and Eren, glancing at the ears and tail. They think for a moment before answering.

"I can probably figure out a cure by the end of the day, but I won't be able to keep an eye on Eren for any signs of after effects; I don't know how his body or mind will react to this. So in exchange for working on the cure, you can watch him for me today Levi!" They clap excitedly at their plan.

"Wait a second four eyes, I have shit I-" Levi starts.

"Great! I'll have it done by tonight!" They wink, ignoring him and already starting to jog back to their lab.

"Fuck." Levi breathes, annoyance written on his face. He turns around to start walking back to the 'castle' they are staying in for now, expecting Eren to follow, which he does.

"I'm sorry about all this, Heichou." Eren apologizes once he has caught up with him. It wasn't until he opened his mouth to talk that Levi noticed the little vampire-like fangs that also were included in the additions from their "experiment".

"Don't apologize, brat. It was all that shitty four eyes' fault." He continues before Eren can try to retort. "I'm assuming you probably don't want your friends to see you like this, right?" Eren nods. "You will stay in my room while I get my work done. Try not to bother me too much." Levi orders.

"Yes sir." Eren makes a small salute as they walk.

/

They get to Levi's room easily enough, as no one else seemed to be around at the moment in the large castle. Levi shuts the door behind him as they walk in.

"You can sit over there." Levi points over to the bed in a corner of the room. "You can read a book or something from the shelf if you want, just don't make any messes." He says the last part more sternly, making his point clear. Eren nods and heads over to the shelf with the books to look for something interesting as Levi walks over to his desk on the other side of the room to start his excruciating paperwork Erwin had asked for.

As the time passed Eren began to feel extremely bored. Levi didn't have any interesting books and he had been studying his new tail for about half an hour now. The other half hour he had spent figuring out how to move his ears and tail which he had to admit were pretty cool to have once he figured out how to use them. It was fun flicking his tail back and forth. Not to mention it was nice how his senses seemed to be slightly sharper than normal. He could hear, see, and smell much more than he could before.

He flops himself lazily onto the bed, facing up at the ceiling of the room, sighing dramatically before opening his mouth to speak. "Heichou, I'm bored."

"Well sorry I couldn't provide you with a hot titan date." He replies sarcastically, boredly flipping through his papers. Eren scoffs at his answer.

"But Heichou, it's so boring doing nothing." Eren whines, standing up off the bed to walk over to Levi's desk. His ears lay low on his head as he pouts.

"Fine, I'll entertain you for a little bit. Erwin will survive if his paperwork is late." Levi gives in. He didn't want to do the paperwork right now anyways.

"Really?! Thank you, Heichou!" Eren perks up immediately, his ears standing back up and his tail flicking happily behind him. He heads back over to the bed to sit down again.

"Whatever brat." He pauses for a second. "Just call me Levi for right now." He adds, walking over to sit next to Eren on the bed, leaving an appropriate amount of space between the two.

"Alright Hei- Levi." Eren corrects himself. Levi would be lying if he said he didn't like the way his name sounded on Eren's lips. Levi had been harboring slight feelings for Eren for awhile now, but never actually advancing on them. For all he knew Eren just looked up to him as more of a father figure than anything else.

As awkward silence starts to set in Eren starts absent-mindedly playing with his tail, twirling the tip around his finger. Levi decides to try to break the silence by starting a conversation. "So what's it like being half cat?" He asks amusedly.

"It's not so bad." He muses. "The ears and tail are fun to move around and the heightened senses are pretty cool too." He smiles.

"What's your tail feel like?" Levi asks curiously, watching Eren still twirling it around his finger.

"You can touch it if you want. It won't hurt me." Eren offers, holding the tip of his tail out to Levi. Levi hesitantly brings out a hand to touch the fur of the tail.

"Soft," he whispers, but because of Eren's improved hearing he hears it and laughs gently, amused by Levi's reaction. Levi retracts his hand at the sound of Eren's laugh, face dusting a light pink. Levi looks up curiously at Eren. "Do you think you like being scratched behind the ear like other cats?" Eren hums quietly before answering.

"I don't know, no one's ever scratched behind my ear before so I wouldn't know." He shrugs.

Without asking first, Levi brings up a hand to stroke the top of Eren's head, moving to behind his ear and scratching gently, as he would with a normal cat. Eren closes his eyes and tilts his head more Levi's way, obviously liking the touch. As Levi continues the gentle touches Eren moans quietly. He squeaks and covers his mouth with his hand and jumping slightly when he realized the sound had left his mouth.

"I-I'm sorry. I didn't mean-" Eren stammers, blushing profusely.

"It's fine Eren." Levi shrugs, trying to look calm but inside his heart was racing.

After a few more silent moments when Levi thinks that no one else is going to say anything and he is about to stand, Eren starts.

"Levi…" he starts hesitantly. "Have you ever liked someone that you're pretty sure will never like you back?"

"You and me both kid." Levi mumbles, momentarily forgetting Eren's sharper than normal hearing. "If you like them, you should just tell them. You will only be miserable if you don't. Always wondering what would have happened if they said yes, instead of you chickening out." Perhaps he should listen to his own advice sometime, Levi thought. Eren thinks for a minute, seeming to be working through something in his mind.

"You're right Levi. I will right now." He announces, a determined look on his face.

"Now? I thought you didn't want anyone seeing your 'accessories'?" Levi asks, glancing at Eren's ears and tail.

"I'm pretty sure they won't be bothered by them." Eren states confidently.

"Then go find them." Levi says, biting back the jealously that wanted to seep into his voice. He stands up to go back to his desk and to the paperwork he didn't want to do.

"But that's the thing, I don't need to find them." Eren adds slightly quieter. Levi turns back around to ask him what he means, confused. Eren is standing up in front of the bed now too. "It's you I like Levi." Eren whispers, looking down and blushing red.

"Me?" Levi can't believe what he is hearing. Out of all the people Eren could have chose to want, he chose him.

"Please don't hate me! I just needed to tell you and I-"

"Eren, I don't hate you, quite the opposite really." Levi interrupts him, stepping closer to him.

"What?" Eren asks quizzically.

"I like you too, you idiot." Levi announces, now standing directly in front of Eren and yanking him by the shirt into a passionate kiss. Eren is shocked at first but soon starts to kiss back just as passionately.

Levi starts to walk forward, pushing Eren back until he falls back onto the bed, Levi following and straddling him, never breaking the kiss. His arms holding him up on either side of Eren's head. Eren tries to run his tongue over Levi's lip, asking for entrance. Levi plays with him and doesn't open his mouth, earning himself a frustrated Eren. Eren then nips at Levi's lip. Levi pulls away smirking.

"Biter are we?" He asks, arching a brow.

"Maybe." Eren replies, smirking back up at him. Both their faces are dusted a light pink and both are panting slightly.

"Not bad." Levi mumbles, smirking before returning to the kiss, this time letting Eren in when he asks. Tongues twirling together and fighting for a dominance that Levi soon wins. As the kiss gets more heated their bodies do too. Their growing erections starting to press against each other through the fabric of their clothing.

Levi's hands trail down Eren's chest, stopping at the hem of his shirt before sliding his hands underneath it and exploring Eren's bare chest. Eren moans into the kiss, coaxing Levi to go further. Levi grabs the hem of Eren's shirt, pulling it up and breaking the kiss momentarily, throwing the shirt to the side somewhere. Eren then does the same to Levi, pulling off the shirt and carelessly throwing it, then running his hands greedily over Levi's chest and down his back.

Their crotches rub together and Eren suddenly bucks up into Levi. "Fuck, Eren." Levi moans, gaining another buck from Eren and Eren gaining another moan from Levi, letting his own out in the process.

Eren's hands trail down Levi's back, stopping at the waist of his pants, looping his fingers into Levi's pants and tugging on them. "Too much clothing." He mumbles.

"Greedy," Levi chuckles, undoing his belt and tugging off his pants, leaving only his boxers left. Eren doesn't say anything in return, he just grunts and tugs off his own pants, also leaving only his boxers. Their erections now painfully obvious against their boxers.

Eren yanks Levi back down into another kiss as Levi runs his hands down Eren's chest, stopping to palm his erection through his boxers. Eren pulls away from the kiss, moaning loudly at the touch. Levi continues to palm him as he goes down to start sucking on Eren's neck, earning more moans in response. Levi sucks and nibbles Eren's neck here and there, leaving love marks all over him as he trails down Eren's neck and to his collarbone, marking the sensitive flesh there too.

"Levi, I want you to fuck me." Eren moans out between heavy pants. Levi pulls away to look at him with lust filled eyes that match the other's.

"If you insist." Levi pants, yanking off his and Eren's boxers and exposing their now free cocks. He reaches over to a drawer by the bed and pulls out a bottle of lube and squirting some onto his fingers. He puts the bottle away before turning back to Eren, who was flushed and panting heavily, waiting. "Eren, I want you to turn on your hands and knees." Eren nods, complying with the request and turning onto his hands and knees, moving his tail to the side. Levi's warm hand wraps around his cock and starts pumping him as he gets the first finger ready. "Are you ready?" He asks.

"Mmm yah," Eren replies, not able to hold back the moan along with it.

As the first finger enters, Eren cringes slightly from the pain but soon starts to receive pleasure from both the pumping and the fingering. Eren's moans start to get even louder as Levi inserts a second finger and then a third, pumping them in and out as he continues his pumps on Eren's cock as well. When Levi stops and removes his fingers, deeming Eren ready, Eren whines in protest, turning his head to look over at Levi with complete lust filled eyes.

Levi aligns himself up with Eren's hole, looking over to Eren for confirmation one more time. Eren nods and thrust back into Levi impatiently. Levi begins to enter Eren, slowly, trying not to hurt him to much. Eren grips the sheets tightly, his eyes shut tight as Levi enters. Once all the way in Levi pauses, waiting for Eren to adjust. As he waits he grabs Eren's cock, pumping it again.

Soon Eren thrusts his hips back into Levi, signaling for Levi to start. As Levi starts to thrust in and out, Eren arches his back, moaning loudly Levi's name. He grips the sheets, this time in pleasure, as Levi continues to thrust into him. Levi's hands hold either side of Eren's waist, as Levi moans out Eren's name as well.

As Levi thrusts into him, he looks for that special spot, trying different angles. As he thrusts at the right angle, he hits Eren's prostate, gaining a loud moan in repose.

"There! Levi, don't stop!" Eren moans out, thrusting back to meet Levi. His tail snakes around Levi's thigh, seeming to hold him so he can't pull away. Levi's leans over Eren, trailing kisses down his arched back. He then nibbles on Eren's new ear, earning him a new moan as he continues to hit his prostate.

"Levi, I'm close!" Eren moans loudly.

"Then cum for me, Eren." Levi groans, leaning over as Eren turns his head, connecting them in a kiss as Levi again begins to pump Eren bringing him closer and closer to climax. Eren suddenly breaks away from the kiss, throwing his head back and moaning Levi's name loudly, cumming over Levi's hand and on the sheets. Levi's thrusts start to become erratic and less organized as he also starts getting closer to climax.

"Inside." Eren barely manages to breath out, panting almost too heavily. Levi grunts and releases inside, his warm seed filling him, shouting Eren's name and moaning loudly. Eren moans at the feeling of being filled. Levi stays put for a minute, enjoying the afterglow before pulling out and rolling over, Eren collapsing from exhaustion as well.

They lay there, panting and catching their breath for a moment before turning to look at each other. "Hey Levi, I'm pretty sure I love you." Eren breathes.

"Love you too, brat." Levi snorts before pulling Eren into a chaste kiss then pulling the covers over them, too exhausted to change the old ones right now. Eren curls into Levi's chest, wrapping his arms around Levi's waist and wrapping his tail possessively around Levi's leg again. Levi pulls him close as he wraps his arms around Eren as well and they both fall into a comfortable sleep.

/

"It took me all day but I finally finished that cure!" Hanji exclaims excitedly, glancing over at the clock that had just changed to midnight. "I wonder if Levi and Eren are still up? Eh, it doesn't hurt to check." They shrug, excitedly leaving their lab and heading to Levi's room.

/

When they reach the room, they don't bother to knock before opening. "Levi, I-" They stop, noticing the two sleeping figures in the bed, curled up under the covers together. They smirk before slowly leaving the room and closing the door quietly behind them. "I'll come back tomorrow, and I want details!" They whisper excitedly, heading back to their room for the night, an excited bounce in their step.


Thank you so much to the person who sent this prompt! I had a lot of fun writing it and I hope you and everyone else who reads it enjoys it too! This was my first prompt so I was super excited to finish it. This is also my second try with writing smut and I like to think I improved greatly from my first try. Of course, I wrote my first try a while ago and just now decided to put it up so there's that too. haha This is also my first time writing in 3rd person so I hope I did an okay job.

Remember that I always love seeing new comments so feel free. I also would love to know how I'm doing or what you think I need to improve on because that can really help me. Also, I'm totally open for more prompt ideas so feel free to share! Thank you! X3