Y/n: What the heck is going on?!

Everyone began to look around to see each other, everyone seemed to have come in groups, there was a group of 20, a group of 8, a group of 7, and a group of four, meanwhile, there were other groups that Y/n didn't bother counting as he stood by himself.

Issei: Rias! Do you have an of what's happening?!

Rias: No, I'm not sure.

Deku: Did someone's quirk bring us here...?

Yang: This is freaky...

MK: This is like, so weird right now.

Neptune: How am I supposed to eat my pudding now?

Shido: This is confusing...

Suddenly, They heard a faint voice in the distance and looked to see a large building with two hallways between the two.

Iida: An academy?

???: Yes, you have all been brought here for an...experiment.

Y/n and the other groups look to see a man in a black coat, and they sharpen their guard ready to fight if he tries anything funny.

???: Hehe, settle down, I'm not going to hurt you, like I said you all have been brought here of a purpose.

Tohka: What kind of purpose?

???: That will be revealed later on, for now, please come with me.

Blanc: You expect us to come with you? We don't even know your name.

The cloaked man looked towards the girl before looking forward again and chuckling a little.

???: My name isn't important right now, just call me "Professor" for now.

With that, he began to walk towards the entrance.

Professor: Come on, we don't have all day.

They all looked to watch each other before following the man, everyone was talking among their groups while Y/n was just walking ahead of everyone silent.

Eventually, the professor guided them to a large auditorium-like room. In the front stood the professor while in front of him were a bunch of seats that were in sections, to the right, there were 7 seats, in the middle were 20 seats, and the the rest was enough for the other groups except for Y/n so he just stood by the wall to the right.

Y/n: (Something tells me I'm not supposed to be here.)

Professor: Now, you have all been gathered here for the sake of improvement, I've seen each and every one of you in battle, you are all very capable against your enemies.

The professor extended his hand to summon a key-shaped weapon.

(The weapon)

Y/n: (What's up with that weapon? Black and goat-themed? Nothing like I've ever seen...)

Apparently, that's what everyone else thought as well because they all had the same confused looks on their face.

Professor: Now I'm sure you still have plenty of questions, if I'm not mistaken then you all come from different worlds.

He looked at the group of seven and pointed at them.

Professor: Earth 666 Japan.

He then looked at the group of eight and pointed at them.

Professor: Remnant.

He then looked at the large group of twenty and pointed at them.

Professor: Earth 1651 Japan.

He then pointed at the group that consisted of a boy and girls.

Professor: Earth 1490 Japan.

He then points at the group of four girls.

Professor: Gamindustri.

He is about to continue his speech when he spots Y/n, he stops in his tracks and puts a spotlight on the green ninja. Suddenly all eyes in the room were on him.

Professor: Who are you?

Y/n: I-I am Y/n Garmadon, sir.

Professor: How did you get here?

Y/n: Well...I was training with my friends, I went all out and used my oni powers, which caused me to be sent to this weird bright abyss for about... three seconds, and the next thing I knew, I was standing out there...

Professor: You must have jumped between realms...! Well, Y/n Garmadon, welcome!

Suddenly, a seat appeared below Y/n, he descended to the ground and sat on the chair, it was actually pretty comfortable.

Y/n: So it kinda works like a time chamber...

Professor: I'm sure you'll want to ask questions, but this is practically day zero, gather in the ballroom, that is where you'll be sleeping and spending free time during your time here.

Kaminari: Where even is that?

Professor: Come with me.

With that, the professor began to walk towards the door and for the first time, the groups all followed him together as one big group. The hallway had nice lights on the ceiling making the place feel like a big hotel.

They all eventually made it to the ballroom, the professor opened the door and held it open for his new students to walk in and they all saw a bunch of large suitcases on the floor.

Professor: This is your resting and free space, you will find a suitcase with your name on it, inside contains your personal belongings.

Everyone began to open their suitcases and like the professor said, they had their personal belongings and clothes inside plus a sleeping bag, there was even one of Y/n.

Y/n: My Starfarer Comics!

Deku: My hero costume! and my notebooks!

Ruby: Crescent Rose!

Issei and Mineta: My magazine!

Everyone including Y/n looked looked at the two either weirded, disgusted, or both making them blush in embarrassment.

Professor: Well I have work to do, see you all tomorrow.

With that, he left the room and closed the door behind him. Everyone began to talk amongst themselves.

Deku: We want to become pro heroes when we get out of school.

Ruby: Nah! Being a hunter or huntress is way cooler!

Weiss: Do you really think this was a good idea...?

Momo: Probably not...especially since we're sleeping in the same room as Mineta.

Ruby: I'm fine with it.

Ashido: it's like a big slumber party! And it's every night!

Yang: I know I approve~

Yang purred while staring at the guys who were wrestling for some reason, Y/n was reading his comics as he used his powers to provide a light, soon grabbing Yang's attention.

As he was reading the latest comic that he bought after defeating the Overlord, two people approached him, one of them was Yang since she saw the green ninja being a cute one, and the other was Kirishima since he wanted to make new friends.

Y/n: Need something?

Yang: Yeah, how about your digits-.

She was interrupted when Kirishima began to speak.

Kirishima: Hey man, the name's Eijiro Kirishima! What's yours?

Yang then shoved Kirishima out of the way to speak to Y/n

Yang: My name is Yang, but you can call me whatever you like~

Ruby then walked over and dragged Yang away from the scene.

Ruby: Sorry about that..she can be kinda flirty sometimes...

Suddenly another girl with black hair and a bow on her head walked over. She seemed pretty serious most of the time. Then another person walked over, a boy with short blonde hair.

Blake: My name's Blake, this is the one group that isn't that crazy, so I decided to come and chat.

Kiba: My name is Kiba, I came here for the same reason.

Kirishima: It's nice to meet you guys! Say, what are your quirks?

Y/n: Quirks?

Kirishima then used his quirk to harden his skin you all looked in sight awe.

Kiba: You mean Sacred Gears?

Y/n: Sacred Gears?

Blake: I'm pretty sure you guys mean Semblances.

Y/n: Semblances?! What the heck are you guys talking about?!

They all turned to Y/n in confusion.

Blake: Do you not have powers?

Y/n: Oh! You mean powers! I have them!

Suddenly, Y/n got up and started making hand movements as green orbs appeared, the light caught the attention of many.

(Y/n's hand movements)

Issei: Whoa!

Tohka: So bright...

Ruby: Nice Semblance there pal!

Suddenly, the light faded away and Y/n then let out a long yawn.

Y/n: Man, using my powers for a long period of time has made me tired.

With that, he grabbed the sleeping bag from his suitcase and got it set up before lying down and falling asleep.

https://youtu.be/TlGN5QRfHaE