"Explain it to me." Eren tensed up.

"Explain what exactly?"

"You know damn well what I'm talking about." Eren stared blankly. "Explain this damned mating thing. Are we mates or something?" Eren blushed heavily, shaking his head vehemently. The older male took a deep breath, leaning against the wall, blood painting his neck, hip, and mouth. The other was in a similar state, and they were both a bit exhausted. They lay at opposite ends of the bed, the wall propping up their bare backs. Modesty wasn't even an issue.

"Then, what the hell is it? That blond kid looked like he was going to rip me to pieces, even though he probably couldn't land a finger on me even if he wanted to." He looked over at the green eyed boy, who seemed visibly nervous.

"It's um…an…intimate bond…that is a sign of their…undying love." Rivaille snorted a little. "It's a very serious ritual!"

Rivaille didn't argue with him; he could see it in that pair's eyes. They both wanted to kill me because I insulted him…He casually glanced over at Eren. Is that how I felt when I was given this power? Why did I save him? Was it this stupid vampire instinct that drew me to him?

"Rivaille-san?" He was drawn out of his thoughts. "Is there something on my face?" This elicited another chuckle from the shorter male.

"Ha…that's funny."He looked at the bed that they were laying on; it was ripped to shreds, covered in semen and blood. The smell was ridiculous. He scrunched his nose a bit before closing his eyes and relaxing once more, waiting for the next wave of uncontrollable passion and bloodthirst to wash over him. "Say, kid, is there someone you love?" The boy's pale face turned as red as the blood all over their faces.

"W-wha? N-no! Of c-course not…" He averted his eyes, but that only made the former corporal even more curious. He crawled over to him, forcing the other to look at him. "What do you w-want?!"

Rivaille took a few moments before he spoke. "Wanna be my mate, then?" He asked, calm as ever. Eren, however, was a complete mess. The blood almost blended in with his heated skin. Even the rest of his body began to turn pink.

"W-why are you a-a-asking such a thing?" Rivaille sighed, leaning away from the other, sitting on the edge of the bed.

"No use, huh? I figured as much." He stood up, pulling up his hair of pants, careful not to get any blood on them. "I'm going out for a bit." Eren was confused and the pink started to fade from his body and face. He got up quickly, but not going to the other's side.

"Rivaille?"

"Don't worry. I'll come racing in once I feel like fucking you senseless." And the pink was back. Before he knew it, the door had opened and shut, leaving a hopeless and confused Eren all alone in the small house. He figured he would clean while the other was out, so he started changing the sheets.

"We're going to have to get more supplies…I think I'm going to need a new bed…and also a new one for Rivaille…" He stopped in his tracks. The question posed by the older male earlier was at the forefront of his mind.

"Wanna be my mate, then?"

His face flushed at the mere thought. Was he serious, or just trying to get a reaction out of him? He didn't know…

But perhaps the other male felt it too. For humans, the few seconds that Rivaille spent to unbind him from the dungeon might have been a blur, but it was all too clear for the young vampire.

Having so much silver in his arms and veins had weakened him to a point where he couldn't walk or run. Luckily his savior has carried him, making their escape quick and almost unnoticeable. He was so weak, and Rivaille had been so strong. But his hands and touch were gentle, as if they didn't want to harm his frail body. His touch was so invigorating that he could still feel it, tingling his bones.

Finally the sheets were washed and a new set was laid over the worn bed, hiding its deformities. Rivaille walked in a few moments later, immediately stripping the moment he walked in. He blinked at the blush he saw from the other.

"I don't want to rip them up. Besides, you're naked too." He sighed, laying down on the fresh sheets, glad Eren washed them thoroughly. They smelled nice. Eren joined him, putting a blanket over his bare lower half.

"It has to be during the full moon." Eren started, but the older male was confused.

"Huh?"

"Then one partner must take a cup of liquid silver and dip his fangs in it. It might be a bit painful, but it shouldn't matter with the one you love." He paused. "There is one weak spot of a vampire. It's the back of the neck." He gestured behind his own, careful not to touch it too hard. "So, the partner makes a deep bite mark in the back of the neck, sucking a bit of blood if he prefers, but when he pulls away, a scar will be left. It's a very intimate mark; it's kind of like claiming another vampire as your own." Eren looked up briefly at the former corporal, who seemed to be listening intently. "Then the other partner does the same, and then the mating is complete. Under the full moon, the ritual bonds their blood together…I don't know why…you should ask my father." He hugged his knees to his chest.

Rivaille remained quiet, laying down on his back, keeping his eyes trained on the green-eyed boy. He looked so vulnerable…so innocent. He didn't know much about being a vampire, but he could tell how intimate the process was.

"Thanks for telling me." He admitted, closing his eyes and resting arms over his forehead. It was silent; almost too silent for both of them. They could both hear each other's heartbeats, and soon Rivaille was too annoyed with it.

"Fuck, I can't stand this." He growled, sitting up in a flash. Eren barely had time to blink before a hot mouth was pressed onto his own, a hot tongue slipping inside the other's wet cavern, The young vampire moaned lightly, opening his mouth with ease and letting the former corporal did what he wanted. But as fast as he had came, their lips pulled apart and he was met with blood-red eyes and a sultry gaze.

"If I'd want the back of my neck bitten on…" He started, lips lingering by the other's ear. "I wouldn't mind if it was done by you." And before Eren could even process and react to the other, fangs dug into the side of his neck, and he knew it was time.

"Ah…Rivaille…you could bite the back of my neck whenever you please." With a shudder, Eren collapsed, letting the new vampire begin feeding on his body. "Yeah…maybe I'd like to be your mate…"