AUTHOR'S NOTE: Hi! I didn't expect this story to catch on like it did! It was cool to see so many people care about some shit that I wrote out of boredom. I'll try to continue writing more, but school's the most important part for me right now. I'll try to update this once a week. Thanks for caring about this! I hope you enjoy it.

"Ah, I see..." Mephisto Pheles said in a fake sympathetic tone. His hand slowly stroked his chin hairs. He sat in a comically large armchair. In front of him was his large, elegant wood desk, displaying a chaotic mess of paperwork regarding the school, notes from meetings, snacks, and manga. Professor Igor Neuhaus sat down on the chair across the table. He had an annoyed grimace on his face, although it was plain to see why; the unconscious son of Satan laid on the floor next to his feet. A withdrawn and confused Yukio stood near his teacher. "You're right. That is a problem," he continued, sarcastically.

"So what am I supposed to do with this?" Neuhaus asked, annoyance in his voice. He pointed down at his feet, not wanting anything to do with him; if it were his decision, he'd kill him on the spot, but knowing that Mephisto should be the person who'd know what to do, he repressed his urge.

"That's not my call," Mephisto replied, looking at the student. Neuhaus gave a cry in frustration.

"What do you mean it's not your call?" He asked.

Mephisto ignored the other. "Yukio, correct?" He asked. The bespectacled boy nodded. "You're the one who summoned him, right?" He nodded again, although this time, he hesitated.

"What did he mean when he said we were family?" He asked the principal. Mephisto gave Yukio a kind smile.

"Why not ask him?" He answered, pointing to Rin, who was now moving.

Rin rubbed his eyes and groaned. When he opened them, he saw Yukio standing next to him. Confused, Rin sat up. "Where am I?" He asked, not seeing Mephisto on the other side of the desk. His question fell on deaf ears, however, as Neuhaus glared at the demon and rolled his eyes. Yukio tensed up as the other regained consciousness; he had read about demons and knew what horrors Satan had done. Was that boy able to do the same things Satan could do? Does that mean that he could to?

"You're up, aren't you?" Mephisto asked. He stood up, looking down at the boy. His large hat covered his face from Yukio and Neuhaus. He gave Rin a wink and mouthed something to his half-brother; from the corner of his eye, he saw Mephisto silently say something to the boy. He gave him a suspicious look but said nothing of it. "What do you think we should do?" Mephisto asked Yukio, looking back up. "You're the one who summoned it, so what happens next is your choice."

Yukio thought for a moment before answering. "I want him to stay here." Neuhaus' eye widened at his request.

"Y-You can't be serious!" He angrily remarked. "That's the Son of Satan!"

Yukio stood confident and repeated himself. "I want him to stay here, just for a little so I can talk to him. I have some questions that he needs to answer." He looked down at the demon, his eyebrows furrowed.

Mephisto shrugged, giving Neuhaus a smirk. "Guess it can't be helped," he said, standing up. He walked over to Neuhaus, wrapping his arm around his shoulder; he began to walk, bringing the professor with him. The two made their way to the door. "I'm going to take Professor Neuhaus back to the Cram School. I'll be back in thirty minutes," Mephisto said over his shoulder. "I reckon that will be enough time for you two to talk."

Once the two were alone, Rin stood up. He made his way to his brother's seat and sat cross-legged. Yukio made his way to where Professor Neuhaus previously sat and got down as well. The two looked at each other, not saying a word. It was Rin who broke the silence first. "What's living in Assiah like?" He asked; he looked and sounded uninterested, although his tail, which managed to come out from his pants in all the commotion, wagged curiously.

Yukio gave him a confused face. "Why does that matter to you, Son of Satan?" He asked, a bit of disgust in his voice. "I kept you here because I wanted to know what you meant. What do you mean when you say we're family?"

Rin smirked, his fangs showing themselves. "Isn't that obvious? It means we're family." Yukio still had a confused look on his face, so Rin continued on. "You're my twin brother." After a bit of silence, Yukio piped up.

"Th-That can't be right," he said defensively. "There's no way I'm related to the Son of Satan. That's impossible, isn't it?"

Rin shrugged, looking at his claw-like nails. "It's possible. Dad even told me. I didn't expect to meet you so soon, though." Yukio frowned. He calls someone as detestable as Satan dad? He thought. It made sense, but it was still weird to hear someone call Satan such an endearing title. After all, this is the same guy who caused the Blue Night to occur.

"So we're twins?" Yukio asked after staying silent for a bit. Rin nodded. "Dad said that we were born from a human mother but only I inherited his flame. That's why you've been living in Assiah while I've been in Gehenna." Yukio thought for a moment and concluded that that made sense; or at least, it sounded somewhat believable. The whole situation was too much for his brain to wrap around. "Is that all you wanted to know?" Rin asked, finally looking to Yukio.

Rin had to admit; the two did look alike. If he recalled correctly, Yukio was a bit taller than he was, but it was no doubt that the two were siblings. They had the same blue eyes and similar facial features. He didn't have the same moles, but he was glad that his brother was the one stuck with those. "If that's all you want to know, I'll tell my br- Mephisto to let me go back to Gehenna."

Yukio looked at the other boy. "Well, I can't really think about any other questions. I'm too shocked, I guess." He sighed, his body deflating in the chair.

Rin checked the clock on the wall; the two still had quite some time before Mephisto would come back. In order to fill the awkward silence, Rin began to talk. "Well if you're done, I have questions too," Rin started. His eyes that were normally serious and collected had a tiny bit of child-like wonder in them. He kept his physical composure, though. "What's it like living in Assiah?"

Yukio rolled his eyes. "Back to this?" He asked. After seeing that Rin didn't waver at his protest, he took a breath and answered. "Well, it's beautiful," he started. "There's so many things to do on this campus and even more outside of it. Back at home, dad would take me to all sorts of places to explore and learn." Yukio's eyes fell down to his feet and he had a happy smile on his face as he remembered all the good memories with Fujimoto.

"I see," Rin said. "It doesn't sound much different then Gehenna then." He sighed, kicking his legs on Mephisto's desk. "I was hoping that there'd be something special in this world."

Yukio gave his brother a baffled look. "Are you kidding?" He asked, his voice a bit angry. "Assiah's nothing like that... that Hellhole! What would you know about Assiah, Son of Satan?"

Rin looked at his brother; he was a bit annoyed at his title being thrown around so normally. It was technically correct to be addressed as such, but he knew that he was more than that. The people of Gehenna all called him Rin and he never acted like he was better than regular citizens. Small flames appeared around his body, menacingly swaying back and forth. Rin's eyes narrowed as he stood up to get closer to Yukio. "I have a name," he said, his voice lowered. "Call me the Son of Satan again and I'll kill you."

Yukio backed up into his seat, his eyes wide from fear. He put his right hand on his gun holster, but because he was trembling so much, he wasn't able to get a grip on it. "O-Okay," was all he could spit out before looking away. Rin huffed and sat back on the seat, his flames retracting. After a bit, Yukio looked back at Rin, his nerves slowly calming down. "So what should I call you, then?"

"Rin," he replied. "I don't like being treated differently because I'm the son of Satan. My dad has nothing to do with my character." He looked at Yukio and chuckled. "How'd a smallfry like you even summon the Son of Satan, anyway?"

"Smallfry?" Yukio repeated, a bit taken aback by Rin's taunt.

Rin nodded and continued. "Yes, smallfry. You know that becoming a Tamer is serious business, right? If you can't control your Familiar, your Familiar won't ever listen to you."

Yukio thought back to the warning that Professor Neuhaus gave before they attempted to summon Demons in class. Rin was right; Neuhaus did say something along those lines. He even told a story of his friend who was badly injured by his Familiar since he wasn't confident enough to control it. "How do you know so much about Familiars? You're not an Exorcist."

Rin laughed; this time, it wasn't in a mocking manner, but in an amused one. "Well I am the Son of Satan," he answered. "Of course I'd know what Exorcists do." He looked at Yukio and his manner shifted again. With a serious face, he came close to his brother. "If you even think about ripping that summoning paper, I'll kill you."

Yukio gulped; he had completely forgotten about the summoning paper in his pocket. After he was brought to Mephisto's office, Professor Neuhaus gave the paper back to him so that he could rip it when he was done. He looked at his brother. "I hope you're not planning anything bad," he stated. Despite his shaky voice, he remained confident. "If you try anything, I'll stop you."

Rin nodded. "Of course not," he replied. "I wouldn't hurt anyone unless they hurt me first. I just want to be here." He stood up and walked towards the door. He opened it up a bit and peered out in the empty hallway. "Let's go," he said to Yukio, not looking at him.

Yukio gave Rin an alarmed look, although he couldn't see it. "Go?" He asked. "Go where? Mephisto isn't even here yet."

Rin turned around at Yukio. "It'll be fine. Trust me," he reassured his brother."Take me to the Cram School. I want to see if Assiah is as good as you say it is."

"You won't do anything to hurt anyone else, will you?" Yukio asked cautiously after a bit of thought. By then, he had already stood up and was at the door with his brother. He kept his distance, though. They may be brothers, but Yukio knew what demons are capable of and he wasn't quite sure if he could trust Rin yet.

"Why would I do that?" Rin asked, impatience in his voice.

Yukio sighed, rubbing his temples. "Fine. I'll take you" He said in a monotone voice. "But if you try anything I'm ripping this paper." Rin opened the door for Yukio to walk out.

Rin smiled, following him to the classroom. "And if you rip that paper I'll kill you," he responded. He stuffed his tail back into his pants before putting his hands in his pocket. An interested Mephisto watched the two leave the office from around the hallway.