A device that can mind control other people in a certain range, to be specific, an artifact. After Ten reveals the artifact to the two, Ryuma and Kiyo, the first one to shout is Kiyo as he approaches Ten and the artifact.
"So all this time, our mind has been controlled by this artifact!? Have you no shame on yourself?!" Kiyo seized the artifact from Ten, but Ten didn't do anything to prevent Kiyo from taking it as he just let Kiyo take the artifact.
"Uhh... How do I deactivate this device..." The complicated part of the artifact makes Kiyo's mind spin as he has no idea how to actually deactivate this so-called mind control artifact according to Ten. Ten on the other hand, just sighs as he watches Kiyo.
"Are you an idiot? Of course, that's only a replica, if I had the real one I wouldn't bother show you this thing." The annoying look from Ten made Kiyo let his guard down.
"What?! You should've told us sooner!" Then, Ryuma steps forward as he asks a question to Ten.
"If that's a replica, then where is the real one?" Hearing Ryuma's question, Ten turned his head slowly to Ryuma.
"The real one is at the principal office."
"Principal office?! That means the person inside there is..."
"Sage Melium..." Hearing its name, both Kiyo and Ryuma have sweat flowing down their body. Looking at the two who are nervous, Ten gains attention by taking the replica from Kiyo.
"This artifact is called Mind Wave. If you look at the round pink eyes part, it was the catalyst that sent the wave to everything in its range, except the wearer. But, the bad part of this artifact is, that it hit everything and everyone in its range. That means you cannot target specific people with this device." Ten walked over to Ryuma.
"I already research on your past, Ryuma. A leader of a delinquent gang called Crimson Flag. The biggest gang in Hana, and you, the one leading it that's called Crimson Devil, King Of Hana. Ryuma Ochirou. Kyora Akumutsu, one of three generals who stand beside The King, called White Fang."
"What does that have to do with any of this now?"
"Nothing, I also did the research on your old school, friends, and even family. For one, you have a good grade. That tells you about your adaption in a fight. You went to many dojo, and you were called the greatest fighter in every one of them. Your family too, had quite a history with the world itself."
"History?"
"It's too early, Ryuma. 16 years is too short even for someone talented like you, that includes you Kiyo. Hear my words, the path you're gonna walk forward is the path none of the other person can normally walk into. The fate itself has engraved your path. I for one, cannot do anything about it..." Words from Ten made the two silent as they looked at each other. Ryuma, with a furrowed eyebrow, asks another question to Ten.
"Say, what does this school want to do with us? To even use this mind control artifact..." Hearing Ryuma's question, Ten took a breath as he closed his eyes.
"That answer, I'll prefer if you hear it from Sage Melium himself." Hearing Ten's words, Kiyo blurted angrily as he grabbed Ten's collar.
"Hey! We have a deal! You'll tell us everything right here right now!" Meeting face-to-face, an eye to an eye, Ten closed his eyes again.
"No, even if I said it to you, you both won't believe it, I can guarantee it." Ten then spin the hourglass shape to the cube part, the top of it, lies the mini building. Someone will mistake it for decoration since its craving is so detailed. But the three know that the building is one with the artifact.
"This, is the school?" Kiyo recognizes the craving as the school they currently step foot into.
"The range is the whole school. Everyone inside it will be affected by the influence of Mind Wave and have their common sense altered."
"Common sense? Say, what part of our common sense is altered?!" Kiyo asks the question Ten, Ten then turns to Ryuma, he looks deep into his eyes.
"Say Ryuma, what do you think about killing?"
"Huh? How do I think about killing? Hmm... Killings without reason is wrong, but it's fine as long the person deserves it. I mean, it's uncommon in this world anyway... Eh?"
"There you have it. The principal uses the Mind Wave to change the common sense of killings within this school. Normally, normal people would vomit if they were to have a bloody hand. But by changing the common sense, the person who is affected by it won't have any struggle against the act of killing. And that's what has been imprinted into your minds, both of you."
Ryuma's gazing into Ten with a distrusting eye.
(I don't know what to believe anymore, why does he tell us this now? What is his purpose? If our minds were changed and our common sense was altered, aren't we basically going to trust his words now?)
"Just to let you know, the effect is ineffective if you're aware of it. That's why I decided to tell you about this. For now, the artifacts are inside the principal office, it's only 1 floor above us. If you really wanna know the truth, you have to hear it by his voice."
As Ten was about to walk past the doorframe to leave the room, his head turned towards the two.
"Oh, by the way, you can use him to your own inconvenience or whatever, purpose as a backup." It was Derugo, hiding inside his own robe again. He looked towards the two with a cowardly expression.
"Huh? You expect us to work with that guy?! No way!"
"Then suit yourselves."
"Wait, where are you going?"
"I have some other things I have to do. I'll come for your aid when the time is right..." Ten leaves the room, leaving the two with the guy in the robe, Derugo...