Saiki's Hero Academia

Chapter 1 - Dimensions

!SPOILER WARNING FOR MY HERO ACADEMIA SEASON 3 & SAIKI NO PSI NAN SEASON 3!

[These are events happening after the Season finale of Saiki No Psi Nan (Season 3) and after the events of All Might vs. All for One ]

"Kusuo!"
In the midst of a dream, Saiki heard someone desperately shout his name. He reached out his hand to try and locate the voice coming out of the darkness.
"Saiki, why are you doing this!?"
Other voices he couldn't identify joined, this time with fear and anger clearly focused towards him.
"Saiki! Stop, I thought we were friends!"
Silence.
Saiki slowly opened his eyes just to be almost blinded by the morning sun shining through his window. He wasn't used to having a headache from dreaming.
He rubbed his eyes and picked up his glasses which he always kept on a small nightstand to the right of his bed. As he looked around his plain room the words out of his dream started circling his mind again, they seemed important but... He didn't know what they meant, neither could he actually identify any voice in his dream. It didn't seem fit, he knew he would remember any voice of his friends since they surrounded him almost every day of school and vacation.
A vision perhaps? Saiki thought, afterall he was a psychic. It bothered him, his visions are normally not this shallow, they show events happening in the near future, like the erruption that destroys Japan, but with these unfamiliar voices shouting his name he instinctively knew that it wasn't anything good.
As he got up and changed into his green school uniform the thoughts would not leave him alone, they blurred most of the telepathic input coming from his neighborhood. In fact, it was blurring his mind so much that at this very moment, even his favorite Coffee-Jelly wouldn't be able to distract him.

Something is wrong.

As Saiki went downstairs into the living room he noticed his mom and dad sitting on the couch in the middle of the living room focusing the small TV with a big smile on their faces. They seemed very excited so he went to check what was going on, although he needs to eat breakfast before goimg to school and the dream made him lose precious time. On the screen was his bigger brother Kusuke who jumped in excitement after Saiki appeared behind his parents.
To no one's surprise, Saiki was everything but excited.
"Hey, little brother! How are you?"
With a very annoyed and bland stare, Saiki didn't respond.
"Oh don't give me that look! I'm just here to greet you, can't a brother care for his family on the other side of the world for once?" He smiled.
I forgot he was back in London to finish some of his research. Saiki thought, still staring at the screen.
"You're so nice Kusuke!" Saiki's Mom Kurumi responded kindly. Her warm smile always makes Saiki feel like a weight has been taken off his shoulder, his kind and caring mom is the only reason he has not commited to the dark side yet.
"Thank you Mama!" Kusuke cleared his throat as if he was keeping something secret.
"Oh yeah Kusuo, I have made a special challenge with one of my new projects, it's a special game just for us two."
Good Grief, I knew he would be up to something.
"No matter what it is, I won't do it." Saiki says with clear anger in his voice, trying to intimidate his brother to stop whatever he is scheming.
Kusuke smiled "I expected you to say no, so I decided to add a price for winning the challenge in advance."
On the screen, Kusuke swayed his camera to the right to show two displays covered under a white blanket in an empty black room. He clearly wanted Saiki to stay out of his way since he used a pitch-black room, thus making Saiki unable to teleport to his location, he needs to have seen the room to be able to use his powers. A cold shiver went down Saiki's spine, Kusuke had it fully planned once again. Kusuke continued to walk towards the left display to reveal the price hidden underneath.
"If you complete this challenge you will be rewarded, with...Your favorite!" The blanket rose to reveal a big mountain of Coffee-Jelly and a cash price of 300.000 Yen (~1600 in coffee-jellies).
Saiki's eyes widened in excitement, he couldn't believe the godly amount of deliciousness standing right in front of him. His desire for any type of sweets right now got amplified by how bad his morning has been. Even though he knew it was a trap made by Kusuke just to lure him in like an animal, he fell right into it, without knowing what this challenge actually was.

Saiki had never lost to his brother in a competition, so why would he lose now? He asked himself while looking at the prize in excitement. The consequences of the vision he dreaded seemed to have disappeared, he could only focus on the coffee-jelly, until Kusuke woke him out of his dream.
"But!" Kusuke lifted the other blanket next to the prize Saiki was wishing for. And it revealed a sign saying: "If you don't agree to this challenge or lose it, I will tell the whole world about your powers. :)" Saiki's mom and dad jumped up at the same time, his mother being the first to catch her breath. "What?! Kusuke, you can't do that!" she was just as shocked as Saiki was, who was now frozen in place.
The camera focused on Kusuke again who has lost his smile and is now glancing at the Camera, his serious look striking everyone in the room like a bullet. He normally wouldn't look at his dear family this way, but for a competition in which he thinks he can only succeed, he decided to put away his fake personality and bring out the hiding demon.

"The challenge goes as follows-"
"Wait, wait, wait- I don't want to do this can't you just-" Saiki panicked...He panicked? Deep inside he knew that his brother was dead serious about this challenge and all he could do is sit tight and panic? As much as he was disappointed with himself, he didn't see any way out.
"You will do it. There's no way you can lose anyway, right? Kusuo." Kusuke smiled at Saiki, but not with a dear smile he used to influence his family with, it was like a devil was smiling at him.
"I have set up a device in my laboratory in Japan, I believe you still know where it is, you know, the one with the cat-tank and all the holes in the wall. Anyways, his device can set you into a trance-like state and will transport your spirit into an alternate dimension, in this dimension I want you to adapt and live for at least a semester as a student. While you live your life there, I will constantly surveil what kind of decisions you make. It will affect only a week of our world, so don't worry about school!"
Just this short explanation left everyone in Saiki's house confused, baffled and robbed of words. There were a few minutes of silence in which all he could think about is the connection between his vision and this crazily stupid challenge. Where did he even get the information about spirits- No wait, he did tests on Toritsuka while he was in Japan, maybe the brainwashing got him to also research about ghosts? Saiki sighed, this was all going way to fast for him, he wish he could just go back in time and change the outcome, but he wouldn't know when or how to stop it.
He felt useless, powerless and thus defeated already.
His dad decided to step in.
"I don't know what this is all about. But as long as Kusuo can't die, it's just like a game right?"
"And I would also reveal my secret if I don't accept or lose, so what other choice do I have?"
"That's true Dad, while you're in there, it will not affect your actual body or your powers in any way. Your powers are also being transferred with you, even though I haven't tested the extent it would affect the strength, since well, this is going to be the first test on you." Kusuke responded.
"I know you won't lose Ku-Chan! And I mean, it's only a week in this world, I'll just hand your teachers a note that you're sick and can't come in for the week."
Why are you all treating it like it's just a game? It's a week for you, but it's a semester full of torture for me, I don't even know what the dimension is like!
"Plus if you're gone I can get some alone time with Mama" His dad smiled.
"Come on Papa, don't embarrass Ku-Chan like that!" She chuckled.
So that's your plan, get rid of me to have alone time?
Good Grief, as long as I can avert the crisis out of my vision I guess I will do it .
"I accept Kusuke. I'll teleport to your weird Lab after breakfast, don't make me wait."
Without saying anything Kusuke stopped the broadcast on the family's TV.
"Tch." Saiki couldn't believe he accepted it.
"Are you gonna be okay Kusuo?" His Mom was concerned, unlike his Dad.
"Of course he is going to be okay Mama! He is our all-powerful son after all!" He smiled.
"Shut up." Saiki hissed at his Dad which made him recoil.

While Saiki was finishing his breakfast he thought about what this "Dimension" could be. He feared it would be just another recreation of his disastrous life. It could be that Teruhashi had made him say oh wow! He shook his head trying to instantly forget that thought.
Maybe Dark Reunion took over and he had to save the world, but on second thought, maybe Kaidou's delusions were getting to him.

Or it could be the opposite and he got rid of the disasters in his life.

He sighed.

Maybe a year in an alternate Dimension could be good after all.

(Author Note: This is one of my first stories, I still hope that my writing doesn't disappoint! Hopefully, I can fuse these animes together in a way you like it!
Thanks for reading.
I'm always up for suggestions and positive or negative reviews to get better at writing, so don't hesitate to criticize!)