Once again, thanks for the reviews, I'm really glad that you are enjoying to read this story as much as I'm enjoying to write it.

Part 1

I decide to follow the trio from a good distance, I can sense presences from quite far so it's no problem

They are walking towards an old building.

I can feel more presences inside. Damn, what's going on in here?

As I check the surroundings, I look up to the window of the old building and then I see that gorgeous girl with long crimson hair looking at the approaching trio, it's Rias again!

Her beauty strikes me so suddenly that I almost forget to hide behind the trees. I'm dangerously close now, if they see me, they'll know I'm spying!

Issei signs to the redhead

"Hi buchou!"

She smiles, waves back and goes inside, the trio goes into the building, it's my time to act. I check if no one followed me, and once confirmed I immediately hide my presence and walk in after them.

Woah...

The building is really neat from the inside! Did they decorate it themselves? There's no way the school provided this things.

There are voices coming from inside one of the rooms, I approach the door to hear the conversation.

"So buchou, what did you want to talk to us?" - I recognize Issei's voice

The voice of a girl who I still don't know speaks.

"...You summoned all of us so suddenly, then it must be important"

Rias starts to speak

"I had to gather everyone today, unfortunately it's not to work on our school festival project. I've received a mission involving a group of stray demons who plotted against their masters to join the Khaos Brigade, but after the defeat of Diodora, they ran away and are now hiding in this town"

"They must be a serious threat" - Kiba says

"Indeed, we believe that they may have useful information about them, so it's crucial that you capture at least one alive, that's why Rias will personally oversee this mission, right?"

A man's voice? He sounds older than the rest

"Yes, onii-sama said he needs to know if they are carrying any useful data regarding the Khaos Brigade"

I see, they are planning to hunt other demons, that's to be expected, evil existences do not respect even their equals.

But, Onii-sama? Rias has a brother? And what in the world is 'Khaos Brigade'?

I can sense the presence of 10 people inside the room, none of them are human, but each emanates a different energy.

I can recognize some: One if a full-blooded demon, must be Rias, two are fallen angels, three have half-human auras, it's Asia, Kiba and Xenovia, one is... a youkai? Really? They even have a youkai?

And three others emanate auras I never sensed before, Issei is one of them, and the other must be Rossweisse, she for some reason has the aura of a demon, but just like Issei, I know there's more to her.

And even though I know there are two fallen angels, I can also sense a difference between them, one is a pure fallen, while the other is different, just like the youkai, they emanate a different aura than what a pure youkai or a pure fallen would give out.

So in total I only know 6 out of the 10, could the dark devil that Kuriko warned me about be among them?

"Shouldn't the student council help us if it's so dangerous?" - Asia asks

The student council? They are on this with the devils too?

"Another mission has been assigned to them, we'll be on our own. It's very weird, but in the last week this town has been attracting more supernatural existences than usual" - Rias answers

Last week? Oh... I guess that's on me.

"Ara ara, Asia-chan. You think we're not up to the challenge?"

A soft girl's voice questionates, she seems to be half-joking.

"That's not it! I just..."

"Don't worry, leave it to us, we can handle it, right Asia?" - Issei interrupts

"Yes!"

Asia answers cheerfully.

"Alright, then we're good to go" Rias voice concludes

Go? They are leaving already?

What should I do?

Exorcise them? Fighting them here might be an option, there's no one but us in the building anyway, my instinct as an esper is to destroy them as soon as possible, letting them make the first move is dangerous...

No, I still don't know their powers and as long as we are inside a school there's a risk of something happening to the students or of my identity getting discovered.

Plus, I've got analyze the information I just got.

I fly out of the building as fast as possible and wait on top of a tree watching the entrance so I can see them when they leave...

But they don't

After a few minutes, their presence disappears, all of it.

There was now only one person in the building, a fallen angel.

WHAT?! HOW?! A door on the back? No, I checked the building inside and out, there was no other entrance but this one!

So...

Teleportation? Yes, that must be it!

I've learned that there are certain types of creatures that can use teleportation under certain circunstances, there are even espers that can do it.

The only one who comes out of the building is an average build man with black hair and a goatee, the fallen angel.

He passes through the tree where I'm sitted and then he stops

Did he noticed me? What should I do?

Oh, wait...

I'm not doing anything suspicious

He turns around and looks at me

I look back at him and wave

Nothing to see here, just a student slacking off in his free time

"Aren't you going home?"

Shit, he's really gonna try talking to me?

"I'm just waiting for a friend"

He nods his head with a suspicious expression, I don't think he's buying it

This man is different from the others, he has the aura of an experienced warrior, not only someone strong, but someone who has been in many battles, bullshiting him won't be easy

"You are the new student, Tatseyo Kageyama right?"

I nod

"Yes, that's me"

"I heard that you are in second year, I'm your chemistry teacher, we didn't get the chance to meet."

What? Are you kidding me? A devil as homeroom teacher and a fallen angel as my chemistry teacher?

"I see, did you want to talk to me about something?"

"No, I just wanted to introduce myself. I'm Azazel, hope we can get along"

What kind of name is that? Could it be that he's not even hidding his real name when living with humans?

"Azazel, like the fallen angel in the bible?"

I decide to confront him about it, he just laughs

"Hahaha, you're right! Looks like my mom and dad had some dark sense of humour"

I sit upright on the tree branch and look at him

"Is that so?"

I reply while staring right at him, this guy is on a different level than the rest, even if Issei and Rias looked strong, this guy must be just as much, if not more. He has the aura of a pure fallen angel, actually, it's one of the purest fallen auras I've ever felt or seem, that means he is not the irregular one.

He stares back, probably trying to see any signs of a killing intent.

"Yeah, is there any problem?"

I can see his aura starting to ooze out, is he threatening me? Or is this a trick to see if I'll react with my own aura? Heh, he's smart, I give him that.

But if he's experienced, so am I, and I won't fall for this so easily

I smile back and reply

"Nothing, hey, at least it's better than Lucifer, right? Hahaha!"

"Hahaha! You are right!"

He laughs along with me, maybe now I convinced him that I'm a normal student

"I'll be leaving now, but don't stay on school too late."

"Roger that, bye sensei"

He turns around and walks away, finnaly! I thought he was never going leave!

Now the building is empty.

I can use it as my chance to investigate!

I go inside and start to check things out, but there is nothing out of the ordinary in most rooms, just some weird books about religion and mystical creatures, some are written in a language I've never seen before.

I walk into the room where they were talking...

Inside there are lots of pentagrams, some that I know, some that I don't

Among the ones I don't know, there is a big one with symbols I've never seen

It's not satanism, nor any other cult or religion I've ever studied, what is this about then? Dad once told me that some evil spirits tend to use brainwashed cults to increase their power, but that doesn't seem like the case at hand, they don't seem brainwashed, actually, they seem to be the ones who are manipulating others.

I take several pictures of the pentagram, to catch it's full view and the details.

After checking the rest of the old building, I see nothing else out of the ordinary and just get out.

I sit at the same tree as before and I ponder about the information I just got...

I realize my great mistake and I facepalm thinking about it

"I didn't check for others..."

The information that the student council is also part of the inhumans got me by surprise, but if I had used my awareness I could have easily detected them...

It's getting late, so most of the students must have already gone home, even if I use my power now I won't catch all of them, so I leave it as a mission for tomorrow

"Time to go home"

Part 2

As I make my way towards the school gate, I can feel an evil energy approaching me

Oh fuck, another one?

I stand still and wait for it to get close to me

"Kageyama-kun?"

I turn around to where the voice came from, it's a girl.

"Yes, that's me"

"I'm a member of the student council, it came to our attention that neither you nor your parents were show around the school, am I correct?"

I nod my head, I never had a chance to check the school facilities before enrolling, so I know almost nothing about the place aside from what I've read.

"You are right, I was busy and so were my parents, so I never got a chance to check the place for myself"

"I was tasked with the duty of showing you the school facilities and answer any questions you may have"

She's very polite and pretty, for a devil that is, and I don't have nothing else to do, guess I could spend my time being guided around the school, after all, I still need to guide myself here.

But of course I have to keep my guard up, by the time she started approaching me I could already tell that she's a demon.

So I was right, even the Student Council is full of them

No, if they are the same as the ORC, then it would be right to say that the Student Council belongs to them.

"Yes, thanks a lot, where do we begin?"

She signs with her hand

"Come with me"

I completely hide my energy and start to follow her, I gotta be careful, this might be a trap