This chapter contains part of the reason for the warnings I left last chapter. There will be more like it so, you've been warned again. Enjoy and let me know what you think!

Disclaimer: See last chapter. I claim no ownership, other than the plot.

Chapter 2

World End had seemed cocky when Rin first arrived. His initial laughter when they first spoke had sent chills down the demons spine, but now the Servamp had withdrawn. Rin took to observing the way the guards treated the man and he noticed that the food Wor was given was significantly less that what he himself was given. The day after the vampire had nearly attacked him, World End was only given one tray of food throughout the entire day. The tray had held a single sandwich and an apple. The man had inhaled the food, even the core of the apple, lounged at the cage again and then went back to facing away from him on the bed.

This treatment continued for about a week. World End finally snapped when the tray showed up with only three grapes on it. Before the guard who had carried the tray could pull his hand back out the Servamp caught him. Rin had noticed that this guard was the one who brought their trays every day. The man had always laughed at World End's reactions, but he wasn't laughing now.

Wor growled menacingly. This man was always that one that starved him and he would not allow that to happen again. In his hunger, Wor lost all sense of humanity and gave into to his animalistic side. The growl was followed by a crazed grin as he opened his mouth and sank his fangs into the guards arm.

The guard screamed and Rin watched, horrified, as the man slowly became pale. Just as his screams died off, six other guards showed up and began shooting World End. Now Rin screamed, suddenly angry that these people were harming his neighbor just because the man had reacted badly to them starving him. They put roughly 10 bullets into the Servamp before he fell and Rin pounded his fists against the cage.

"You bastards! It wasn't his fault! Why did you kill him?!" The guards all ignored him. Once World End fell they rushed into the room. They threw his body onto the bed, leaving a clean set of clothing on the floor next to it. They dragged away the body of the dead guard and then quickly cleaned up the blood on the floor, before slamming the cell door shut and re-locking it. Then Wor laughed, and Rin nearly jumped out of his skin.

"I'm not dead, you idiot," he smirked as he sat up to face Rin. "I do, however, have a lot of energy I need to work off. I would suggest you plug your ears and not look over here for the rest of the night...unless you're into that."

"What?! Never mind that, how are you alive?" Rin had recovered from the initial shock and now he wanted answers.

"I'm a goddamned Servamp remember? I can't die. Besides, drinking that much blood leaves me almost at my strongest...and also my most energetic, so if you're not going to turn away..." Wor reached down and pushed his gray cotton pants down to his knees before kicking them off.

"What are you doing?!" Wor only smirked again in response, before grasping the waist band of his black boxers. As he began to slowly pull them down Rin seemed to get the picture and quickly turned away, moving to lay on his bed facing the wall. Wor grasped his fully erect member in one hand and moaned at the sensation. Briefly, he noticed Rin move his hands up to cover his ears, before he turned his attention back to his masturbating.

Being locked in a cell like this didn't leave many options for burning off energy after he drank blood. The first time he had drained his neighbor of their life essence he had bounced around the cell in his animal form, running as fast as he could in the small space. It had helped a bit, but mostly it just made him dizzy. The second time it happened, he had taken to punching anything he touched. He had destroyed the bed and the toilet in the corner, but the walls were reinforced in some way that made them unbreakable and the first time he punched one it had shattered the bones in his right arm.

When he had drained the blood from the third person he had finally discovered the best way to blow off energy in this tiny area. He couldn't remember exactly how it had started, but somehow he had discovered that he was aroused. Following that feeling, he had masturbated furiously, eventually rutting against his mattress to relieve the aching in his gut. Due to his energy boost he had ended up destroying the mattress again and he fully expected to do the same this time around. The only difference was that this time he had an audience, even if it was a reluctant one, and it was an extremely handsome audience as well.

The moans continued long into the night, and Rin wished he could just fall asleep and ignore them. He had no idea why World End was doing that, but it was annoying. After the first two hours, Rin gave up trying to cover his ears. It wasn't working anyways. He had tried to talk to Kuro, but he couldn't focus enough to have any kind of coherent conversation. The cat had given up and curled up at the foot of the bed, quickly falling asleep. Rin threw a jealous glare at his familiar before returning to staring at the wall.

At some point, World End's moans had morphed into grunts of pleasure and Rin suddenly felt curious. Being a 16 year old, he hadn't had much time to experiment with his own sexuality. He wasn't sure how old World End was, but if he was immortal it was a safe bet to assume he was fairly experienced. The teen carefully lifted his head off of the bed and turned slightly to peek at the older man. World End was propping himself up on his elbows, face tilted up slightly, eyes closed, as he rutted into the mattress.

Rin turned a little further, suddenly finding himself entranced by the white haired man. The man's mouth was opened slightly to let out his little pants and grunts. His now naked skin shone with a sheen of sweat. Studying World End's face, Rin finally noticed that he had three small, round marks just below his left eye. The marks were black and appeared to be a tattoo. Everything about the Servamp was sexy as hell and, without his permission, Rin's cock twitched in his pants.

Wor opened his eyes slightly as he neared another climax. From the corner of his eye, he noticed that his captive audience was finally taking an interest. The demon was chewing his lower lip gently as his eyes roamed over Wor's exposed flesh. When their eyes met Rin blushed furiously, but Wor held his gaze. The Servamp gave a sexy smirk before throwing his head back and coming loudly. Panting for breath, he rolled onto his back putting his still fully erect member on display for the young demon. As his breathing slowed Wor took himself into his hand and opened his eyes, meeting Rin's gaze once more as he began to stroke.

Rin swallowed hard, his erection now straining almost painfully against his pants, begging for some friction. Since World End seemed to be fully enjoying this, Rin didn't hesitate any longer. He sat up, leaning against the back wall so that he was sitting on the foot of his bed, facing World End. He then pulled his pants and boxers down to his knees, gasping as his erection sprung free. Wor licked his lips and watched as Rin began stroking himself. At Wor's reaction something inside of Rin snapped and he cried out, almost sounding pained.

"You're mine," he growled suddenly. Wor saw blue flames flash in Rin's eyes as the younger man stared at him. Surprisingly he felt no fear. A wave of calm, pleasure rolled over him and he felt very warm under Rin's gaze. All at once he realized that Rin's words didn't sound so bad and he quickened his hand's movements along his shaft.

"Yes, yours," he panted. They held eye contact, both of them giving in to their animalistic sides as they reached their climax. Finally feeling spent, Wor closed his eyes and drifted off to sleep with Rin falling asleep soon after.

"Dammit!" Tsuyuki cursed as the guards finished their report. The men flinched, but remained silent, waiting for orders or to be dismissed. "That asshole should never have been hired in the first place. He knows what total starvation does to World End...well, he knew. I don't need another dead inmate on my hands either. If that Servamp should try to kill the son of Satan...gah. Dammit, dammit, dammit!"

"What should we do boss?" One of the guards, Tsurugi Kamiya, timidly asked. He was the only one Tsuyuki wouldn't threaten when he got this angry. The other guards were grateful for his bravery. The prison warden sighed, running one hand through his hair before turning to face them.

"We'll have to move Rin. Even though we put that collar on him, I'm not sure Satan would allow his son to be killed and we can't have fucking Satan showing up here. Go and find a new cell for him. Then come and find me when you are ready to move him."

"Yes sir!" The men answered before leaving to make the preparations. Tsuyuki had a bad feeling about this entire situation and he found himself wishing that Tinker would hurry up and come back from where ever she had run off to this time. She was one of the only people that could calm him down and was probably his closest friend as well. Shaking his head, he turned his attention back to the stack of paperwork that had been created as a result of this latest disaster and got back to work.

It took the guards nearly an hour to come up with a solution. While there was a new wing of the building being constructed, it was no where near ready to house one of the inmates and all of their other cells were currently full. All except for one. It was a cell that resembled the ones Wor and Rin currently occupied, but the bars that divided the space into two cells had been removed. This cell had housed a troll until the creature died about two weeks ago. It had recently been cleaned, but they hadn't had need of it until now. They prepared the cell to house Rin and his Cat Sídhe familiar before running to inform Tsuyuki.

When Rin woke that morning, the morning after something inside of him had snapped, he felt odd; almost incomplete. He groaned when he noticed a pounding pain in his head. He rolled onto his back to hopefully help the pain in his head and immediately regretted it. His muscles ached all over and he was reminded of the feeling of having the flu. This theory seemed all the more likely when he realized that he also had a fever.

'Rin?' Kuro asked, sounding concerned.

"Kuro...what happened?" Rin groaned again, covering his eyes with his right arm.

'I don't think you really want to know.' The cat sounded nervous and Rin raised his arm slightly to glare at Kuro. 'Okay, okay. I think you triggered a mating.'

"What?!" The loudness of his own voice caused him to groan again and he lowered his arm to cover his eyes once more. As he lay there, he remembered a conversation Mephisto had with him not long after he started attending True Cross Academy.

Flashback

"Rin, there are a few things you need to know now that you're a fully realized demon." Rin had glared at him, waiting impatiently for the man to continue. "First of all, your tail..."

"What about it?" Rin asked defensively. He had been keeping it hidden under his shirt by wrapping it around his midsection and he felt it twitch in response to his emotions.

"It's similar to most animals in that it will react according to your emotions. Unlike most animals though, it will be sensitive so make sure you don't let anyone touch it. Secondly, and most importantly, demons go through a mating process when they find the person or demon who was destined to be with them..." Mephisto continued to explain, but Rin had no interest in how mating worked as he wanted to avoid getting into that type of relationship. Besides, who could ever love the son of Satan?

End Flashback

Rin racked his brain, trying to remember if Mephisto had ever explained whether the process could be stopped once it had started. Mentally, he scolded himself for not doing a better job of listening to his half brother. What did he even mean, the person who was destined to be with them...Rin firmly believed that you made your own destiny, but he couldn't deny the facts that were right in front of him. He had never even had any physical contact with World End and yet, here he was.

"Rin? Are you okay?" World End's voice broke through his thoughts and he slowly lowered his arm to look up at the white haired man. His neighbor was leaning against the bars that separated them, looking at him with concern. Rin had a sudden urge to launch himself at the man, but Kuro laid down on his chest, and using the little strength he could muster through the collar, he held the demon in his place on the bed.

'You need to talk to him first Rin. He might not want to be your mate,' Kuro explained, sounding sad at the end. Rin was having a hard time fighting the urge to touch World End, but he knew the Cat Sídhe was right. Besides, in his current weakened state, Kuro wasn't having much difficulty holding him down. Sighing, he resigned himself to talking first.

"N-not really..." he stuttered on his response and tried to swallow, his throat suddenly feeling very dry.

"Oh, well, just listen to me for a minute then," Wor started, running a hand through his hair nervously. "I'm not sure how you feel about last night...but I have to let you know that I've made a decision. I want you to become my first eve..." Rin furrowed his brows. He remembered World End mentioning eves before, but still had no idea what that meant. Wor must have seen his confusion because he rushed to explain.

"Remember how I told you that I'm a Servamp?" Rin nodded. "That means I'm a 'servant vampire' and the only person I'll serve is my master, or eve. We'd have to make a contract, but once I'm bound to you I'll protect you and do anything for you. Also...I would only be able to drink your blood..." The last part was said so quietly that Rin almost didn't hear it. He considered the older man's offer, but before he could speak Kuro nudged him, reminding him that he needed to explain himself before answering Wor's question.

"There's something you should know first..." World End waited, watching him expectantly. "Since I'm a demon...what we did last night...well." Rin sighed, frustrated that he was having such a hard time explaining himself. "Demons have mates that were made for them...Once they find that person they go through a mating process. What I'm trying to say is that what happened last night...it triggered the mating process for me." Kuro rubbed his head against Rin's hand, trying to comfort the demon as they waited for Wor to respond.