Disclaimer: I don't own Blue Exorcist or Naruto.

Yukio looked at his brothers seat with both regret and hate. One one end, he loved his brother and would do anything to protect him, but on the other end, he also hated his brother for basically killing their dad and doing the exact opposite of his last wishes to let Rin live a human life. Either way, with both Mephisto and Rin gone, things were in chaos. Without Rin, no demon S-class missions could be completed, and without Mephisto, his school, let alone the town, would be overrun with demons before long. Right now Mephisto had sent his 'older brother' which really unnerved Yukio because the only other older brother Mephisto has is Lucifer and he's part of a secret organization that no one really knows about.

"Okay class, lets begin."

Rin cracked his neck and suddenly sneezed. "Either I'm coming down with something, which I highly doubt, or someone is talking about me." Ino down below in the Reaper pit which he had made himself in one night out of courtesy struggled to confuse a Reaper that was chasing after her. She had tried shadow jutsu, but he quickly shot down the idea of it ever working, since Reapers could sense strong emotions, and would easily scent out the real person.

"The idea is to close down all emotions in order to beat it. Or give off a dominate aura like I did the first time I tried." Sasuke already had it figured out, of course his arrogance got it the way a couple of times but it worked out in the end...sort of.

Down below Hinata shrieked as a Reaper managed to get a hold of her. It shook her back in forth without mercy, Rin could hear a sickening crack from her arm where the Reaper had a hold of her. His eyes widened and before Kakashi could get to her, he was there and had punched the Reaper square in the face. It gave him enough time to snatch her out of it's grasp while it was distracted. He set her down gently and let loose a very menacing aura. All the Reapers, twelve in all, shipped from Mephisto to Rin, absolutely shook in fear.

But the Reaper, the biggest and apparently the alpha did not back down. It bared it's teeth and now Rin was extremely pissed off. "No one hurts my students and lives to see the next sunrise." He grabbed a chain nearby that was bigger that his head that was the Reapers collar and tugged on it, hard. The Reaper went flying to the opposite side of the pit, slamming into it's cage. The momentum caused the gate to shut behind it.

"Everyone can go home, don't bother to come Sunday tomorrow, I have business thanks to this god forsaken creature. Hinata started tearing up. "It's because of me that the Reaper reacted so bad, I really am pathetic, Neji was right." Rin sighed and knelt down next to her. "I'm no healer but I think you should get that checked out. And don't feel bad, I was kind of worried about the alpha to begin with, why Mephisto sent me that cocky ass one anyway is beyond me. It could happen to anyone, even your cousin, the Neji brat I believe."

Hinata smiled, "Thank you, Rin."

Rin nodded, "Anytime." Shikamaru and Rock came by her side and ushered her out, the others following. As soon as they left Rin ruffled his hair and shouted out to the heavens, "DAAAAAAAAAMMMMMMMMNNNNNNNN YOU MEPHISTO! THIS IS GOING TO BE SO MUCH PAPER WORK!"

in a little corner you could see Mephisto giggling, "payback for all the paperwork you gave me, you little demon."

Rin thanked the gods above, it was Monday and he would only have to endure for a little longer before he could get to the fun stuff with class B. Okay, now you've already learned about coal tar, but now we move on to Reapers breifly and then to chuchi. After that you are free to go since that's all I really had planned for you." He wrote on the board, "Reapers can sense strong amounts of emotion and you must be devoid of it because of that, or else they will immediately attack you. Most are used as encouragement during P.E. classes nowadays, like my own teacher did as an 'exercise'. The only other way to defeat them other that brute force is to have massive amounts of dominant emotions like rage or deadly auras. Otherwise, Run like hell."

Everyone sweat-dropped at his crude explanation. When he turned back around, someone was making fun of him, which he had no doubt was either Ino or Naruto. He furrowed his brows and then wrote something else on the chalkboard.

"Chuchi, even if low level, are still highly dangerous in large swarms, especially with the alpha around. They swarm their pray and then suck them dry and eat their carcasses."

He nodded to himself and turned back around again, no one was laughing now. He smiled creepily and then giggled. "I may be your teacher but I am still a demon." They all looked confused, except for Naruto and Shikamaru of course. Rin looked at their confused faces, "What? I never told you I was demon?" They all shook their heads no. *sigh* "Okay, I guess I can squeeze on last lesson in, and on Wednesday, you are going to be learning about more demons."

He erased the chalk board and then drew a mirror. He put a little Kuro in it, and then drew another mirror next to it, and drew a random person in it. "There are two worlds, like a mirror, or two sides of the same coin, they are called Assiah, and Gehenna. Gehenna is basically Hell, or Hades or whatever you wanna call it. And Assiah is the reality that we live in.

I however am from both realities, from both worlds, half demon, half human. My mother was a human woman, I never knew her name, let alone what she looked like, since she died at childbirth. She had both me and my little brother a demon cave, where demons lived. They were actually helping her, since she was on the run from something, I never knew what.

My dad, Shiro Fujimoto, or more accurately my adopted dad took us in, without caring that I was a demon. I was raised as a human without knowing about my heritage. My little brother was bullied, so I tried to use my strength for good, but people didn't understand how bad it was, how bad he got beat up, so I beat them back, and I got in trouble for it. I was four at the time when I was grounded constantly from fighting. I didn't know my own strength and I put a lot of kids in the hospital because of it.

When I was seven I had gotten stronger and I had lost control, and when Shiro tried to help me, I ended up breaking his ribs. He tried to cheer me up the whole time though." Sakura giggled, "Your dad sounds pretty awesome." Rin chuckled, "Yeah, but he was a sleazy old pervert too. His idea of cheering me up was telling me that he got to be taken care of by a hot nurse with big boobs."

Naruto burst out in full blown laughter, "I-I would like to meet him." Rin smiled fondly at the ground. "Yeah, he was a bastard, but he was my dad too. One day when I turned seventeen, apparently I had to get a job, I ended up screwing it up for myself, because I was awakening. Awakening means that I started seeing demons, or coal tar to be more precise. The king or rot was hanging around at that time."

Sasuke spoke up, surprising them all, "What happened next?"

Hahahahah finally!