Cats and Dogs

Eren's P.O.V.
I was getting antsy. The next full moon was approaching, and for some reason I felt angrier and more paranoid than usual. I don't know how I was able to tell that I was angrier and more paranoid. I just could, I guess.
Armin had gotten fed up with everybody, especially the raved-haired girl named Mikasa, and shouted so loudly everyone shut up. It wasn't his tone or volume that made everyone quiet down. No, he did something else. Something so primal and instinctual that one had no choice but to listen. His body racked back and forth. His hands were clenched into fists so tightly it caused his veins to pop out.
I wasn't the only one to notice. Everyone did. Jean's nose twitched. The bald guy and food girl quirked their heads a bit. The guy named Marco shivered a little. Mikasa just stood there with a weird look on her face.
"What?" Armin had heaved out between labored breaths. We all just looked at him.
"What do you mean 'what'?" Jean asked. Armin stood straight and looked the horse-face in the eye.
"I mean, 'what'. Is there another meaning for 'what' that I am not aware of?" Armin asked back, with a hint of sarcasm.
"I think what Jean means is: where did that come from?" Marco peeped. Armin looked between the two. He seemed just as confused as everyone else.
"Where did what come from? The yelling? You guys were being too noisy. I had to get you all to shut up somehow. Why?" he asked.
"It's just--we've never heard you sound like that, Arminie," Sasha piped up. Connie nodded in agreement.
"I don't know what you all are talking about. I have a headache. Sasha and Connie, take Mikasa and Marco home. Jean, go home. Eren, go to bed. I am going to take a nap. I will see you all in the morning," Armin stated, a bit weary. We all watched as he turned around and headed for the stairs of the elevated patio. The second he lifted his leg to begin to climb the first step, he stumbled and fell backwards.
"Armin!" I shouted, lunging forward and catching the poor blonde. The back of his head hit my chest, and he slumped into me. Everyone gathered around us.
"Armin! Armin, are you okay?!" they all asked worriedly.
"I am fine. I'm just dizzy, is all," he replied, eyes closed.
"Armin?" I asked.
"Hm?" he responded.
"I'm gonna carry you to bed. I don't trust you to walk," I told him.
"No, I am fine, Eren. Don't you dare--" he tried to protest as I swept him up into my arms. I was carrying him, princess style. I huffed as I made my way up the stairs. I shouldered the door and it gave way. No one followed us. I made my way up the stairs.
"Which one?" I asked Armin, nodding down the hallway. Armin opened his eyes a bit, then shut them quickly.
"Last one at the end of the hall," he mumbled. I walked down the hall with an armful of blonde haired cat. I pushed it open and walked into the small room. I set Armin down on the bed and went back to the door. Closing it, I heard a small whimper. I turned around to see a red-faced Armin curling up into the fetal position.
"Armin, what's wrong?!" I asked, fear sitting heavily in my stomach.

Armin's P.O.V.
"Armin, what's wrong?!" Eren asked. He sounded scared. I curled in on myself as another cramp pulsed through my body. My head hurt. I could barely breathe. My palms were really sweaty. Everything hurt.
Everything was amplified. I could hear everything, from Eren's breath to the sweat dripping down my forehead. I could see everything, from the large pupils of Eren's eyes to the keyhole in the old bedroom door. I could taste everything, from the fibers in the sheets when I bit onto them to stifle a whimper to the iron in my blood when I bit my lip instead. I could feel everything, from the tears running down my cheeks to Eren's pulse through his hand when he placed it on my forehead. I could smell everything, from my own body to Eren's sweet scent emanating from him.
Why did he smell so good? Why did my heart rush when his hands grazed my skin? Why did he make me feel this way? How did he make me feel this way?!
"Armin, what's going on?! What is happening?! Why is this happening?! Why--why do you smell so gooood?" he asked, panicked at first but then sultry. I opened my eyes just enough to see him lick his lips.
"Eren, what--what are you th-thinking?" I managed through pained moans. Eren stopped kneeling by the side of my bed and stood, towering over me. His eyes were basically black, pupils strangling out the previously emerald orbs. 'Why is he acting like this?' I thought.
Eren swayed a bit. He looked me up and down, seemingly sizing me up. He leaned down and kissed me. It got heated pretty quickly. Eren held my head by the nape of my neck. The pain I felt eased, if only a little. I couldn't help but moan when Eren slipped his tongue into my mouth.
"Mmff!" Eren grunted. He climbed onto the bed with me, pulling me close to him. He grabbed my ass and squeezed hard. It kind of hurt, but felt just as much good. He wriggled in between my legs and gently rocked his hips. He grazed his fingers up my leg and rested his hand on my crotch. Then, he squeezed!
"Aahh! E-Eren! Please! I--" I opened my eyes out of shock. What I saw sent a shiver down my spine, in either fear or anticipation. Eren's emerald eyes were completely drowned out. They were almost demonic, black pupils shinning in the dimming light. His ears became pointed at the tips, just like that of a wolf. As he opened his mouth to nip at my neck, I caught a glimpse of his growing incisors. Not only were they larger, but they were more than sharper.
"Shut up!" Eren growled through his teeth. I was horrified. I didn't want this. I pushed him away. I kicked him in the chest, causing him to topple over and fall off the bed. Hitting the ground, he snarled. I scrambled out of bed and onto my feet. Eren rose to his as well.
He took an assertive stance and basically pounced on me. Or, at least, he tried to. I swerved to the side, avoiding his growing claws.
"EREN!! STOP!!" I screeched. Eren snarled, growled, and grabbed me. I don't really remember what happened after that. I just remember white, then I was in the middle of the forest near my house, completely naked, covered in blood, no clue what had happened....

Eren's P.O.V.
I don't remember much. It's all just so hazy. Whenever the wolf comes out, I can never remember what happens. All I remember is carrying Armin into his room, laying him in bed, seeing him in pain, and then being washed over with so many sensations. Good and bad.
I remember letting the wolf have full range. I remember letting it take control. I remember grabbing and.....biting Armin. Fuck, I feel like he worst person in the world.
I grabbed him and pulled him towards me. Then, he screamed and lashed at me, claws streaming down my arm. Blood rushed, and it stung. And, just like that, the wolf went back into his cave, so to speak. Armin's eyes weren't blue anymore. They were black. Black as nothing.
He snarled and hissed. His usually wide eyes were cut in slits. His teeth were sharpened into fangs. I looked to his hands, where his nails had grown from well-filed to gnarly-sharp. His breathing was ragged and heavy. Next thing I knew, he was sprinting down the hall on all fours, tail trailing behind him.
"Armin? Armin!" I shouted after him. I started after him as he started down the stairs. "Armin, stop! Stop! St--" I shouted as I ran. That is, until I saw Armin, the small-framed boy I knew as my savior, turned into a hulking lion, mane and everything. "Holy sh--" I began, but I was interrupted by Armin roaring into the dimming sky. "Fuck! FUCK!! Armin!"
He looked back at me, then started to gallop off to the woods. Someone must have heard him. It was going to be difficult to hide a massive male lion in the suburbs.
I ran after him, but he was too fast. I had stamina, but I was only in human form. I could never keep up with a lion. I had to do the only thing I could to catch the damned blonde. I had to change.
"Fuck, this is going to hurt," I mumbled to myself as I slowed my breathing. Forcing a transformation never felt right. When a werewolf transforms because of mating, or pain, or the full moon, it's natural and accepted by the body. When a werewolf forces a transformation, on the other hand, it is painful and rejected by the body. Only Ultimates and their very close next of kin can transform by the sheer force will instead of nature. That doesn't make it feel any better, though. Wolfsbane, I have heard, can help with the pain, but only in massive doses.
I felt as my bones stretched and reformed. Tears came to my eyes as skin ripped and regrew. I think I passed out, because all I remember is darkness before I was sprinting after the scent of a were-lion.
I caught up to him after a few minutes. What I saw what he had done chilled me to the very core. There was a male deer, a buck. Lion Armin jumped up and tackled the thing to the ground. Within a matter of seconds, the buck was dead, and Armin was devouring it in huge chunks.
I stayed low, worried of what he might do if he caught sight of me. He let out another earth-shattering roar, making the very trees themselves tremble. I followed him for the rest of the night, watching as he leapt through the dense forest and chasing running animals. When he finally got tired of running, or he was no longer hungry, he climbed up a low-hanging tree and flopped down like a big, woolly dog after a long run.
He soon fell asleep under the night sky. I crept up to him slowly, afraid to wake him up. I looked up, expecting to see the stars shining bright. The Sun was slowly creeping into view. 'Wow! He was up all night!' I thought to myself. I ran behind a tree to transform back. I tried to bite my lip to stifle the pained shouts I was making, but some of them slipped through. I bit my lip so hard that it split, and blood began to drip down my chin.
"Crap!" I whispered to myself under my breath, wiping some blood off on my hand, "Note to self: don't bite lip with wolf teeth." I looked down at myself. I was covered in dirt, but no bruises or cuts to be seen. Being related to my dad had its perks: regeneration and inheritance. I had forgotten to undress before changing, so my shirt was stretched and ripped, along with my boxer shorts. At least they still kind of covered what they needed to. I walked back around the tree to find a small, blonde-haired boy curled up and shivering in the morning air.
I pulled off my shirt and wrapped it around his small body. He was covered in blood. None of it was his, but it was still a scary sight.
"C'mon, Kitty. Let's get you home before you freeze," I mumbled to Armin as I held him princess-style. I carried him home. He only lived a few blocks from the edge of the forest, so it wasn't that bad. Since it was still just breaking dawn, the world had not yet woken and opened its eyes.
I pushed the gate open and took Armin to the garage, because I was afraid his parents were home. I somehow got the door open and lied the poor blonde on the couch. I ran into the bathroom and started to run a bath. I came back in, picked the little were-lion off the couch, and brought him into the bathroom, where the hot water had begun to steam, creating a kind of cloud.
I eased Armin into the water, seeing him flinch a little at the temperature difference. Then, he seemed to calm in his sleep. His hair had turned to pink from the blood. It made him look like a cartoon character.
I washed off all the blood I could and put him in one of the shirts I had. I put him back on the couch and covered him with a blanket. I crouched down and just looked at him. His beautiful eyelashes, rosy cheeks, cute little button nose. Man, he really looked like a girl.
"Sleep tight, Kitty, " I mumbled to him (more like myself). I leaned down and pressed my lips to his forehead for a second or two. Then, I got up, walked over to the lawn chairs that were still out, sat down in one, and put my face in my hands. Sighing, I rubbed my eyes with the heels of my hands. "What is he gonna do when he wakes up? Christ."
Slowly, I drifted off to sleep, too. I had been up all night, after all.