SCP-184 is a dodecahedron. Upon being placed inside of any enclosed space, it will do nothing for one hour, before expanding the inside of the object. After a while, the rooms it generates will become incoherent- doors on the ceilings, windows that had walls on the other side, ETC.
What they don't know is that this certain anomalous object is incomplete. It lacks a master, a user. And that's the role that Naruto will do.
"... Silence is everywhere, nobody is making a sound. Too serious for the test that they're currently taking. Yes, the students, for once, takes their studying seriously. It is quite terrifying that that teacher is the only teacher that can discipline them." an old female teacher tells her friend, which is also a teacher from another school .
"He must've been teaching there for a long while then. Honestly, these stories you tell me is quite full of exaggerations." she replied.
"No. He just started this year. And the strange thing is that... even if he can make the whole room silent, the students still likes him."
"Rias. What he uses isn't magic." a black haired buxom woman tells her king.