Introducing: Inu!Eren~
Yupyup, this one's gonna have Inu!Eren in it, and it's a sickfic. Woohoooooo
Anyway yeah here you go ya weebs

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Armin sighed at the sight of the feverish inu sleeping uncomfortably on the couch before him. He had a disturbed expression on his face as he breathed unevenly, and his messier-than-usual hair was plastered to his forehead due to sweat. He has a blush covering his pale cheeks and his tail twitched every now and then.

'Dangit Eren. You just had to get yourself sick, didn't you?' Armin thought as he leaned down to shake the inu. 'I know sleep is healthy for him right now, but he hasn't eaten all day...'

"Eren, wake up."

Eren awoke to Armin shaking his shoulder, and he looked up at him, his eyesight a little hazy. "Huh? A-Armin...?"

"Eren, you're sick and you haven't eaten anything today. I'm sorry to interrupt your sleep, but you need to be taken care of."

Eren sighed as he slowly sat up and leaned forward, trying to stand up, but he felt his legs give out beneath him and he ended up leaning on Armin for support.

"Woah!" Armin pushed him down towards the couch, "There's no need for you to stand up. I'll make something for you to eat, you just stay here and sit, ok?"

The brunette nodded and sat back down, and Armin covered him up with a nearby blanket. He walkef into the kitchen and opened the pantry, finding a can of soup he could make for Eren.

After a bit of struggle, since he'd never made soup before, Armin came back to the sniffling Inu with a bowl of soup, and some medicine. He set the bowl on a table next to the couch, took a spoonful, and brought it to Eren's mouth.

Eren turned away, "Armin, I can feed myself, you know..."

Armin shook his head, "No, I'm going to feed you. Levi's at work, so I'm going to take care of you for the time being."

"He'll be home in a few hours... You don't need to take it so seriously, I'm fine." Eren said, right before sneezing.

"Just open your month and let me feed you, you idiot."

Eren sighed, and let Armin put the soup in his mouth, swallowing it. "Well, at least the soup's go--" He was interrupted by a sudden cough attack, causing Armin to drop the spoon back in the bowl and rush to his side, patting his back. "E-Eren!"

The coughing subsided after a painful 10 seconds. Eren's tail and ears drooped as Eren wheezed. "Th... That hurt..." He said hoarsely.

Armin sighed in relief, "Maybe soup wasn't the best idea..."

"N-No, it's fine. I really liked the soup, actually." Eren smiled nervously.

Armin picked up the spoon he put in the bowl, and hesitantly got another spoonful of the soup.

Once the soup was finished, he had given Eren medicine, which he didn't complain about, much to Armin's surprise. Armin decided that sleep would be the best thing for Eren at this point.

"Alright... you sleep. I'm going to clean up the house..." Armin said as he stood up and began to walk back towards the kitchen, but Eren grabbed his shirt before he could exit the living room.

"Armiiin, stay with me... Please?" Eren pleaded.

"No, I have to clean before Levi gets home... He'll be mad if I don't."

Eren whined, "Nooo, he'll understand... Just stay here."

Armin sighed, his tail twitching in irritation, "Fine. But once you fall asleep, I'm getting up to clean." He said, sitting down on the couch.

Eren wrapped his arms around Armin, "I'm fine with that~."

Armin waited for Eren's grip to loosen so he could get up, but that never happened. He gave a small groan and looked down at the inu, "Eren? Are you asleep?"

Eren shook his head tiredly, looking up at the neko. The blonde pouted, which Eren found adorable. Armin then felt Eren reach up to grab his face, pulling it down towards him and giving him a sloppy kiss on the lips.

Armin frowned when he pulled away, a small blush appearing on his cheeks, "Great... Now I'm gonna get sick, you jerk... This is why I hate dogs. They're so reckless."

"Awe, you don't hate me~" Eren said cutely.

Armin's blush darkened, "Well... No, but... You're different."

Eren laughed, and snuggled his head in his partner's lap, his arms still wrapped around him.

After Eren fell asleep, Armin expected to get up easily, but Eren's grip was tight. Like, really tight. Tighter than a sick person should manage. The neko struggled, but Eren wouldn't let go. Armin eventually saw it was impossible, and stayed sitting down.

A few minutes later, he sneezed. 'Ugh, dang it, Eren!' He groaned, as he settled into the couch and decided he should just sleep since he had nothing better to do. Before falling asleep, he looked down at Eren, who had a satisfied smile on his face.

          ~~~A few hours later~~~

Levi entered with a sigh. He looked around, not expecting to see the house still a bit messy, unlike how it was usually clean when he got home.

"Huh." He didn't think much of it (but he made a mental note to thoroughly clean the house later). Instead, he didn't notice his 'housemates' anywhere, and decided to look for them. "Eren? Armin?" He called out, walking into the living room, stopping when he spotted the two.

They were cuddled together on the couch, both looking pale as a ghost, but with peaceful expressions on their flushed, sweaty faces. Levi immediately realized the situation and sighed, "Damn pets. I leave them alone for half a day and they've gotten themselves a fever." Nonetheless, he smiled. But now he'd have to take care of his sick gay pets for the next day or two.

Wish him luck~

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Dear grandmother who may or may not be reading this:
YES, I DID INDEED USE THE WORD "DAMN," BUT I NEEDED TO, IT WAS THE ONLY WAY I COULD KEEP LEVI IN CHARACTER. I KNOW IT'S NOT THE BIGGEST PROBLEM IN THE WORLD, THERE ARE WORSE WORDS, BUT STILL.
Ok, now that that's out of the way...
I have no idea how to write for sick characters, considering I rarely get sick... But whateverrrr I tried my best ;-;
I also had to rewrite the first half of this because I accidentally erased it the first time I wrote it... So I was really mad about that -3-
Anyway, random Inu!Eren fun fact/headcanon:
Even though he's half dog, he can eat chocolate. But it's not really something he likes or prefers to eat, since most of the time simply eating more than half of a Hershey's chocolate bar can get him really sick, nowhere near death though. So, while chocolate to others may be a comfort food, to Inu!Eren it's more of a "I hate everything and kinda feel like dying" food.

Well, that's it. Hope you enjoyed~