The time has finally come. The final battle was about to go down as the demon slayers rushed to the Ubuyashiki's estate. Sweat dripped from their head as they all ran at full speed after seeing the explosion.

"What's going on?" Tanjirou mumbled to himself. 'Oyakata-sama, Please be safe.' He thought.

On the other hand, Gyomei was able to destroy the demon king's head with his spiked ball. To his utmost disappointment, Muzan started regenerating his head.' As I thought, just as Oyakata-sama predicted. This man, Muzan will not die no matter how many times I cut his head off.' Gyomei thought. ' The speed of his regeneration is unlike any demon I've ever faced. Despite weakening him with the explosion and what our accomplice did to him, he still has a lot of strength. It can only mean that I have to keep him at bay till sunrise.'

However, the stone hashira was pulled out of his thoughts once he sensed an attack as Muzan unleashed his demon art. 'Black blood demon art, Chains of thorns'.

'Stone breathing, Third form. Igneous reflection,' Using his huge spiked ball, he demolished the incoming attacks by swinging it around him preventing himself from harm.

"YOU BITCH! WHAT THE FUCK DID YOU DO TO OYAKATA-SAMA!!!" Shinazugawa Sanemi, The wind hashira shouted coming into glance. His eyes were full of rage.

'The pillars are coming. Wonderful." Gyomei thought as he looked on seeing the love and serpent hashira.

"Oyakata-sama!," The two hashiras yelled.

"IT'S MUZAN!! KIBUSTUJI MUZAN! THIS GUY WON'T DIE EVEN IF YOU CUT HIS HEAD OFF." Gyomei shouted to the rest of the demon slayers. The same words come across their mind. It was him. The man who cost the innocent lives of people, who made a lot of people suffer. A tick mark formed on their heads looking at the demon king with resentment and hatred.

Muzan turned around to see the slayer with Hanafuda earrings. He had multiple tick marks forming on his head with his demon slayer mark activated.

"MUZAN!!!" Tanjirou exclaimed while running towards the demon king preparing to use his breathing.

'Mist breathing, Fourth form.'

'Insect breathing, Butterfly dance.'

'Serpent breathing, First form.'

'Love breathing, Fifth form.'

'Water breathing, Third form'

'Wind breathing, Seventh form.'

'Hinokami Kagura, Sunflower Lance...'

Muzan smirked malevolently. Before anyone could continue to attack, A biwa sound was heard causing all of them to fall into the infinity fortress.

"YOU SERIOUSLY THOUGHT YOU COULD CORNER ME! YOU ARE ALL GOING TO HELL NOW!!" Muzan announced." You pathetic demon slayers! I'm slaughtering you all tonight!"

"YOU ARE THE ONE GOING TO HELL MUZAN!! I WILL DEFEAT YOU FOR SURE!" Tanjirou yelled.

"Come and get me if you can KAMADO TANJIROU!!" Muzan mocked as they fell into the castle.

Without warning, a spatial portal appeared pulling them into it. The demon slayers and the demon is shocked by the turn of events. Just now they were in the estate, soon they were in the demon king's fortress. Now they are in a spatial realm. Of course, none of them knew what happened but prepared for the worst at the very least. Muzan was beyond confused. Was this Nakime's blood demon art? He didn't hear the sound of her biwa. No this can't be it.

None of them had an idea of what just happened. They also didn't know they would end up somewhere entirely different from their world.

MEANWHILE*

"Deku-kun...Deku-kun, Deku-kun" Midoriya snapped out his thoughts looking up to the person who called him. "Uraraka?"

"You looked lost. Something wrong?" She asked setting her tray of food on the table while sitting next to him. She had noticed the boy starting into nothing for about five minutes now. He hasn't touched a single food on his tray.

"I'm fine. I was just thinking about what Mr Aizawa has in store for us later today." Midoriya replied finally taking a bite from his katsudon. "He said we should change into our P.E. outfits after." He said with his mouth full.

"You shouldn't eat with your mouth full. You could choke." Iida said as he robotically pointed out with Uraraka giggling at how his face looked when stuffed with food.

"Oh my bad." He said before swallowing. "Thanks, Iida."

"Don't mention it. As the class rep, I have ensured the well-being of my classmates." He adjusted his glasses. "That said, I also have the same assumptions as you. There was supposed to be a meeting with the teachers today but suddenly we were told to change to our P.E. uniforms."

Todoroki was sitting next to Midoriya while silently enjoying his cold soba. He was not a person of many words but he contributed sometimes. Maybe it will help him to socialize more.

"It might not be different from the other trainings we had but it's Mr Aizawa we are talking about," Todoroki stated. The others nodded in agreement.

"Hey, Maybe Mr. Aizawa's in a bad mood. That is probably the reason why he told us to change after." Kirishima pointed out.

" You might be right. He did look exhausted today." Kaminari added.

"Idiot. He is always looking like that." Jirou replied making Kaminari look sullen.

"A quirk-enhancing training? Maybe or it could be a normal physical exercise" Sero stated while comforting the blonde.

" I bet whatever he has for us is going to be related to our end-of-the-term test scores. It seems pretty likely if you'd ask me." They all turned to the grape-haired boy. "What?"

"What do you mean by 'what?'?" Sero said having an intimidating aura about him.

"You aren't trying to jinx it. Are you?" Kaminari joined.

"I'm just saying it's possible. I mean it's Mr. Aizawa, what do you expect to happen?" Mineta simply stated trying his best not to be intimidated by the two boys who look scary at this moment.

Sero and Kaminari had concluded that Mineta purposely said that. They continued their banter until someone appeared behind the two.

"WILL YOU TWO BASTARDS JUST SHUT THE HELL UP?" Bakugou roared startling the three.

"Wait, Wait... You weren't even bothered before. Does this mean Bakugou cares about how we feel?" Kaminari taunted.

"SHUT UP DUNCE FACE," Bakugou yelled at the electricity quirk user. However, The bell rang signaling the end of lunch and the beginning of the next period. Everyone broke off from the cafeteria and to their respective classes. The members of class 1-A went into the changing rooms to change into their P.E. uniforms. By the time they were done, Everyone was present in the P.E. grounds.

Mr Aizawa was already there waiting for them with Midnight next to him. His eyes were the same as ever but something about him being in a bad mood was on point.

"Right let's get this over with. I suppose you are all wondering why there was a sudden change in today's plans." Aizawa said glancing at everyone who nodded in response. "This is just a P.E. session. It will not be recorded as part of your scores at the end of the term."

There were sighs from the students. Mostly from the bakusquad as Mina and Kaminari sighed in relief. "However, the person or group that fails this exercise will have to clean the classroom every day for the rest of the month." The entire class tensed up at that.

'Aizawa-sensei is definitely in a bad mood.' The class thought. Someone amongst the students raised their hand.

"Asui?" The fatigued-looking pro hero asked.

"Is there any reason why Miss Midnight is here also, kero?" Asui asked.

"Yes. She will be here to supervise the activity of today. Miss midnight will continue now." Eraserhead finally concluded before going back inside the school.

"Alright students, This will be a relay race. The first person on his or her team to cross the finish line first wins. Quirks are permitted in this race. Just don't get in the opponent's way." Midnight announced holding her whip over her shoulder while doing a sultry pose making mineral drool.

The class became rowdy as soon as she finished. No one expected it to be a relay race. The fact she said that there would be teams had everyone excited. They were taken to the arena which was about 400 metres long. There was also an obstacle course on the field. Midnight noticed some already having panicked looks.

The teams were as follows:

Group 1: Todoroki, Uraraka, Asui and Kaminari.

Group 2: Mineta, Iida, Kirishima and Hagakure.

Group 3: Midoriya, Jirou, Koda and Sato.

Group 4: Bakugou, Aoyaoma, Ojiro and Yaoyorozu.

Group 5: Tokoyami, Ashido, Sero, and Shoji.

"You have five minutes to decide who is gonna start the race and continue. Now hop to it." Midnight started watching as each group started huddling together. She mused to herself about earlier when she picked the teams. Not everyone would approve of their teammates since not all of them have the right quirks for the exercise. It was a way for them to bond with one another and improvise.

Five minutes were up and the first leg came towards the line. Asui, Mineta, Sato, Aoyaoma, and Sero we're in position on their respective lanes.

"On your mark... Set...GO!!" Midnight said lashing her whip in the air.

"Those Class 1-A are at it again. Showing off their quirks like they are the best class." Monoma sneered looking through the window as he saw the race.

"Oh! They are doing a race huh? Seems fun if you ask me. The best part is that quirks are allowed." Tokage said looking on.

"My bro Kirishima better not disappoint me. His quirk may not help much in running but he is demolishing those obstacles." Tetsutetsu chimed in taking note of how his familiar red-haired friend was destroying the obstacles.

"What?! Nothing is interesting about 1-A. Nothing but a bunch of...Ouch!" Monoma was cut short by a swift chop to the neck by Kendo.

"Monoma, Sekijiro-sensei wants to see us." She said dragging him out of the class. Once they were out of the class, Monoma rubbed his neck in pain.

"Have your chops gotten firmer? Seriously, you have to stop that. You might break my neck one day."

"You on the other hand should stop making everything competitive with the other..." Kendo began scolding but she stopped, and so did Monoma.

There was an unconscious group of people lying on the floor. According to the two, they assumed they were about their age. They couldn't be students since they had never seen them here before. One wore a strange outfit with a green and black checkered patterned haori and a pair of hanafuda earrings, Another wore the same outfit. Maybe it was a uniform? With a white triangle patterned haori while the last one was a boar-headed boy who was half naked but also wearing a pair of jeans similar to the other two.

"What happened here and who are these guys?" Monoma questioned which was ignored by Kendo who kneeled next to them.

"They are unconscious. Nothing else. No signs of wounds either." She turned to face her classmate. "We need to rescue them."

Monoma had a skeptical look on his face. "Rescue them? Hey! Look at this." Monoma pointed at the swords on the hilt of their belts.

'Swords? What are they doing with swords and why are they dressed so oddly?' Kendo thought. "Still, let's get them to recovery girl." Monoma hesitated at first but agreed shortly. He grabbed the blonde-haired slayer and boar head.

"These guys are heavy, especially the boar head." Monoma began as he struggled to carry the two. Kendo slung the other one's arm over her shoulders to support him as they walked in.

As soon as they entered, Recovery Girl was nowhere in sight. Gently, They placed them on their beds while placing their swords in the corner of the room. Kendo decided to go look for a recovery girl while Monoma stayed behind to watch over the strangers.

She walked quickly in the hallway hoping to run into the healing pro hero. To her luck, she sighted her next to the staff room discussing with her homeroom teacher and Mr Aizawa.

#Preview

"I wonder who those guys are? I've never seen them in U.A. before. Could they be villains and how did they manage to get past the security?" Kendo said calmly.

"Maybe they are new students joining the first year's. That should be the reason why our teacher called us. To introduce them as the new members of 1-B" Monoma discreetly smiled to himself while Kendo watched with an exasperated look. "Our increase in population will show how superior class 1-B is to ... " Monoma slumped as Kendo chopped his neck before he could go any further.

"Anyways... Next, Chapter 4: Where are we?" Kendo smiled before walking off pulling the knocked-out Monoma alongside.

To be continued...