"It just hurts!"

Rivaille cursed some more as he covered his mouth with his hands as his fangs came out. They were both seated on top of a messy bed, sheets and pillows all over the place. But the clean freak wasn't focused on it at the moment. Right now, his teeth ached and his throat was incredibly dry. No matter how many glasses of water he drank, he couldn't get rid of it. He still had yet to come to terms with his new transformation.

"I know it does…it's even worse for new vampires as well. The best thing right now is for you to drink." Eren suggested for about the fifth time that day, holding out his wrist. Rivaille scooted farther away.

"But that's fucking disgusting." He said, chugging down a whole pitcher. "Fuck what the hell is wrong with this water." Eren frowned.

"I thought so too when I first fed, but it's different than you think." The younger male scooted closer, cornering Rivaille and making sure he wouldn't escape. "Your senses are jumbled at the moment, so escaping is impossible." He was right; all that was on the former corporal's mind was drinking anything to get rid of this irritation and thirst.

Before he could comprehend anything, Eren grabbed his mouth, opening it wide so the sharp fangs were practically dripping with anticipation. Saliva slid down the male's cheeks and Eren was done watching him suffer alone. He shoved his wrist into the other's mouth and hissed slightly when his skin was pierced.

Once Rivaille had his first taste of the other's blood, he gave in immediately. His eyes were a dark crimson and he grasped the arm with both hands as he fervently sucked on his meal. Eren shuddered and let his body rest on the other's. He felt one of Rivaille's hands let go of his arm and travel else where. The bites moved up the arm, leaving marks as he went. Eren was more than prepared for this. He too had his first time, and was probably just as lust driven as the man underneath was right now.

Eren lifted his head and those fangs pierced the exposed flesh on his neck, and he exhaled slowly. His body shook with need; his senses were on fire, and he let his body do what it wanted.

Both of them wasted no time in stripping each other bare; it was easier for them to feed. Both of them were on their sides and facing each other. Eren seemed to enjoy the former corporal's hip, sinking his teeth in and drinking what he could. Rivaille had aimed for the major vein running along younger male's inner thigh, making bite marks along the skin. Then Eren let out a sharp gasp as something else was sucked.

"W-what're you d-doing?" The green-eyed male asked, his mouth and chin covered in his meal. His tongue lapped up what he could as he stared as the new vampire started sucking the dangling organ between his legs. "Nngh…" The other didn't answer him, but instead sank his teeth into the sensitive organ.

"A-ah! Ahn…ngh…f-fuu…R-rivai…" Eren was at first terrified as he saw fangs about to anchor themselves in his most precious body part, but there was no pain; only pleasure. His teeth weren't made of silver, so pain wasn't even part of the equation. It was so erotic and hot that he couldn't even focus on feeding for the time being.

Rivaille wasn't much in his right mind as he detached himself from Eren's member and flipped the boy on his stomach. The younger male let out a startled cry as teeth now buried themselves into the flesh of his ass. He could feel blood drip down to his pink hole where he felt a hot tongue lap at the red liquid.

"Hah…ahn…R-rivai…hah…ngh…nah…"His moans echoed quite loudly in Rivaille's ears, and he moved based solely on instinct. He thrust a finger past the hole, fascinated by the other's body. One quickly became two and three while Eren moaned beneath him. The skin tore a bit easy, making him bleed a bit more. The older male dipped down to suck on the tight ring of muscle, the blood turning him on.

His own member began to leak, and he grunted as he pushed himself inside the other. Again, to Eren's surprise, there was no pain. Sure it was uncomfortable at the moment, but Bertholdt had told him about this before and—

"GAH! Hah…fuu…Rivai…ngh…ahn!" So that's what he was talking about. It was his pleasure spot, and Eren saw red behind his eyelids. The mere color of blood in his eyes only heightened his senses as the other thrust into him like an animal. His fingers dug into the sheets and his head buried into the mattress too. Rivaille leaned over his back. continuing to thrust as his teeth sank into the other male's back.

He was on a high that he couldn't even form coherent thoughts. The pressure on his dick was erotic and the blood sliding down his throat was satiating his need. Why had he been so stubborn before? He wasn't killing anyone…it was just Eren. Eren… "Eren…" His name rolled off the former corporal's tongue with ease, his voice rough and husky.

Hearing his own name spoken in such a manner only made him more needy. His own hips thrust backwards to meet the other's own, the sound of skin slapping against skin becoming deafening. Rivaille gripped onto the other's hips, his nails digging into the skin. At the smell of the fresh blood, he dipped down for a moment to lap up what had spilled from the other's body.

"Rivai…t-thirsty…fuu…gah…" Eren panted out, turning his head. Understanding what his partner needed, he bit into his own arm, sucked up some of the blood from the vein there, and leaned down to seal their lips together and give the vampire boy what he needed. Their fangs clashed against each other, creating this painfully delicious sensation which elicited wanton moans from both of them. The younger male had his fill, and his tongue slid inside his mouth to lick what he missed before. But the older male didn't stop thrusting, so his moans echoed and vibrated in the former corporal's mouth.

"Ngh…" Rivaille grunted and pulled away, a thin trail of bloody saliva connecting their mouths as their glazed red eyes were entranced in one another, becoming lost in the pleasure from feeding and sex. It was something that under normal circumstances Rivaille would never have imagined doing something so exotic and animalistic. But things were different; he wasn't human anymore. He let go of that side of him when he feasted on Eren's arm. But…why…he still didn't feel all too different (minus the extreme hornyness and bloodlust). He still had his mind…still wanted to save the humans…what part of him changed?

With a final grunt, he thrust one last time, spilling his seed inside the other. As he pulled out, he saw the milky substance mix with a bit of blood, and he couldn't resist himself. The salty taste of his own cum was muddled out by the iron-y pleasure from his lover. Eren squirmed slightly as a tongue was thrust inside him. He had already came before the older man did, creating a sticky mess underneath him. Rivaille gave a few last bites into the round flesh mounds, drinking up the rest of his meal as dessert.

Slowly but surely they both started to come down from their high. They both lay against the wall, stark naked and covered in blood and sweat. Both of their mouths were painted with each other's blood, and the sheets would never been the same. It was a miracle the frame of the bed stayed intact despite the fact that they nearly devoured each other (and it wasn't a gentle devouring at all).

Rivaille's head was spinning with everything that had just happened. His eyes glanced lazily over at the other, who had recovered rather quickly. He tried to speak but couldn't. Thankfully, Eren understood fully.

"I've been a vampire for two years, and you have been for a mere 12 hours. I'm used to it." He stated simply, picking up the limp man and carrying him off of the messy bed. Rivaille couldn't even protest. He had no idea that Eren had filled the tub with water already as he was placed inside it. He leaned back in the tub, eyes glancing up at the boy.

"Jaeger…" He muttered, but the other only hushed him.

"Sit there and relax. I'm going to change the sheets to prepare for the next round." The former corporal's eyes raised, his unspoken question evident in his gaze. Eren only grinned. "You may not feel it now, but you will soon." He explained, leaving the room only to come back momentarily. "The sex drive between a human and a vampire is vast. Humans only need a hot-filled night to satisfy them, but vampires…" Eren bent over to pick up a bar of soap off the floor and plopped it in the tub. "Vampires need about a week." Well that was surprising in itself. And Rivaille wasn't really complaining.

"So I'm stuck for a week with a cheeky brat?" Eren only laughed and grinned deviously.

"Would you rather spend it with my dad?" And down went Rivaille's erection. He grimaced and dunk his face in the water. Eren smirked. "My dad is still human, but he offers himself to newly transformed vampires. You might think it's gross now, but you won't care when you're sucking him dry." This sparked a bit of curiosity in the shorter male.

"Did you..?"

"No, thankfully. It was with my best friend, but I'll introduce you to everyone next week once your raging vampire hormones have leveled out." Rivaille snorted.

"You're lucky I'm the one you're with. If it was anyone else I know…" The boy shuddered at the thought. "But they all have mates, so you don't have to worry. Oh, right. Mates. I forgot to mention." Eren left the room and came back with clean sheets as he talked to the male in the tub. "Don't fuck or feed or do anything to someone's mate…" The boy trailed off a little. Rivaille was about to ask why, and the younger male shook his head to silence him. "You don't want to know."

He left again, this time not coming back for a while. The older male assumed he was changing the sheets, so he relaxed in the tub a bit. The water was cool against his heated skin, and it felt quite pleasant. But it didn't last long, because the lust was back and he couldn't control himself anymore. Eren came back and frowned slightly as he came back to a soaking wet Rivaille who was standing in the middle of the bathroom, eyes a dark crimson.

"I hope we make it to the bed…"