Hey, I'm back with another story in my Gohan crossover series! Be sure to read my prequel story called Gohan's Beginnings to know how this all started if you haven't already! Enjoy!

Disclaimer: I do not own Dragon Ball Z nor do I own Assassination Classroom. Please support the official releases.

Chapter 1: A New World

With Gohan

It had been approximately 5 minutes since Gohan had first arrived in the void. He was currently traveling through a swirling black and blue tunnel while unconscious. After about a minute of this, he started to wake up and noticed his surroundings.

"What the? Where am I now? The last place was so empty but this? This is beautiful. I wonder where it's taking me." he said as he floated there motionless and in pain.

Just then, he started to see a bright light at the end of the tunnel. And all of a sudden, he fell through it.

A minute earlier above the Sea of Japan

It was just another regular day. Nothing but cloudless blue skies for as far as the human eye could see. There was the occasional aircraft that would fly by every now and then but other than that, it was perfectly calm.

That is until a small black and blue vortex that was rapidly starting to appear. The vortex began to grow slightly larger until it got to about the size of a full-grown man.

This, of course was not a naturally forming phenomenon though as even the birds soaring through the skies and the fish below the seas began to flee the area in desperation.

It was almost as though their primal instincts knew that this vortex could mean trouble for them.

This went on for a few more seconds until a small form shot out of the vortex and into the water below.

On the positive side, all the marine life in the area had fled due to the thing falling being just a young boy so he didn't have to worry about getting eaten by a shark.

But, on the negative side, this also meant that the boy was at major risk of drowning. However, fate had different plans for him.

A military base in Japan

"Sir! We have an urgent message for you!" A middle-aged man with short brown hair, glasses, and a little bit of stubble. reported to his superior as he ran in from another room. As soon as he approached his General, he immediately saluted him while he waited for a response.

His general was a much older man but by no means feeble. He was still pretty fit for his age and if it wasn't for his thick gray hair, one would believe he wasn't a day over 50.

"What is it, Lieutenant? Is it the octopus?" Replied the General as he stood up from his chair. Ever since the governments of the world have joined forces to kill the being responsible for destroying the moon, everybody has been keeping an eye out for anything unusual and any openings to get the drop on their seemingly invincible adversary.

"Unfortunately, it is not, sir. However, we have detected some strange anomaly just west off the mainland. It was just above the Sea of Japan." The man answered with some uneasiness. This however did not go unnoticed.

"Is there something else you'd like to tell me?" The General asked his Lieutenant. If he was right, this could be dangerous.

"Well... yes, sir. There is. But, first can you come with me to the monitor room. It'll be easier to explain if you saw it yourself." Answered the Lieutenant with obvious confusion, uncertainty, and nervousness in his voice.

Then, without saying a word, the General nodded and both men walked out of his office and into another room.

In that room, there were several other men and women all scrambling around trying to get satellite images focused on one specific area. However, whatever they were looking for was clearly not visible to either the Lieutenant nor the General.

"So, what am I looking for?" Questioned the General. A few months ago he would have believed this was a waste of time but ever since a certain yellow octopus that could fly and move at Mach 20 speeds, he was more cautious about things.

"It's not there anymore, but we do have some recorded data right here on these charts. I think you might think it's pretty interesting." Replied a woman with short blonde hair and blue eyes as she walked up to the General with a piece of paper.

As the General looked at the charts in front of him, his eyes widened in shock.

"This looks almost exactly like what the Americans recorded about 2 months ago. Except this is much smaller and disappeared much sooner." The man said in surprise. First that happened and now this? What was happening?

"That's what we thought too so we've been trying to find out the exact location of whatever THAT is. Unfortunately, the Americans were unable to find anything since it took them around 3 hours to get to the location. However, since this is so close by, we might have a better chance of finding something than they did." The woman said optimistically.

"Very good. I want any and all personnel in that area to immediately dispatch to the location as soon as you find out where it's originating from." Commanded the General. There was no way he was going to let this mystery slip out from under him. Especially when it was within his own jurisdiction.

With Gohan

Thankfully for the young demi saiyan, when he landed in the water, he managed to keep himself conscious long enough to swim back to the surface of the water. Albeit, with a great deal of difficulty.

Now all he had to do was keep himself conscious long enough for one of the other Z fighters to find him, wherever he was.

That's when he decided to stretch out his senses. He intended on sensing out the energy of the others or even that of his mother and grandfather.

But that was when it hit him.

"What!? Why can't I sense anybody!? What's going on!?" Gohan asked himself with obvious panic in his voice. However, he didn't have the luxury to dwell on his thoughts as he felt his body trying to pass out on him from his injuries.

He then used every bit of his remaining will power and strength to keep himself conscious. He had to somehow get himself to land and find out where he was. The only problem with that plan though was the fact that there was no land visible in his line of sight.

So, with that taken into account, Gohan started to weakly and slowly swim in a random direction until loud sound suddenly assaulted his ears from above.

Upon hearing this sound, Gohan started looking up to the skies. It sounded almost like a hovercar or a plane from back home. Maybe he could be saved!

He then saw a strange looking plane. It looked similar to the ones back home but it was much sleeker and nicer looking. Then, just as he started to wave at it so he could be seen, it flew off in the direction it came.

"No, come back!" Gohan cried out as he slowly slipped out of consciousness. This was bad. He was going to drown out here. At least he'd get to see his dad again in Other World. He could only hope his dad wouldn't be too mad at him.

Due to him slowly losing his consciousness though, Gohan could just barely make out the sounds of what sounded like a boat coming towards him before passing out and sinking beneath the waves.

A few hours later in a secret base

Due to the unknown origins of the boy before them, Gohan had been locked away a quarantined hospital room somewhere in a military base. It was eerily white. Not only that, but, it was ominously quiet with the only sounds being that of the occasional nurse entering the room and the beeping of a heart monitor.

As for poor Gohan, he was unconscious there in the room with the only thing between him and the outside world being a wall of reinforced tektite glass. The same type of glass that was used not too long ago to separate a certain octopus-like creature and a government agent.

The octopus had taught the governments of the world the hard way that you shouldn't be too careful when dealing with someone or something you don't know.

As the minutes went by though, Gohan began to stir as he was having a terrible nightmare. It was then that the heart monitor also began to beep much faster as his heart rate was rapidly increasing.

This caused a nearby nurse to run to the boy's side to assess what was wrong. However, before he could do anything, Gohan sat up in a cold sweat.

"Huh? Where am I? Where's dad?" Gohan questioned as he took in his new surroundings. The whiteness of the room kind of reminded him of the hyperbolic time chamber but he decided to ignore that as he tried to assess the situation.

"Hey there, my name is Mike. I'm one of your nurses here. You seem to have been having a nightmare. Are you ok?" asked a young man who seemed to be in his mid 20s. He had short blonde hair, blue eyes, and a little bit of stubble on his chin.

"...Yeah... I'll be fine. Where am I? The last thing I remember was drowning in the middle of the ocean. By the way, my name is Gohan." Gohan said to the man as he turned to look at him. He took note that his left shoulder was bandaged up as well as several other parts of his body. This made him realize that he shouldn't try moving around too much or else he might reopen his wounds.

Even if he felt a little bit better than he did earlier.

"Well Gohan, I'm sorry to say this but I can't really answer your question. I'm not authorized to do so or else I would tell you. All I can tell you though is that you were found in the middle of the ocean and you were brought here to be looked at." Explained the man honestly but not without making Gohan a little bit on guard.

'Ok, so wherever I am, it's a secret. Could this be some kind of military thing? Am I a prisoner?' Thought Gohan as he began to panic.

But before he could worry even more, Mike put his hand on Gohan's good shoulder to comfort him.

"Don't worry, everything will be ok. Judging from your reaction, you seem to have a good idea of what's going on here. But it's ok. It's just that nobody here knows who you are or where you're from. We're just being cautious." Mike said as he continued to try and calm the demi saiyan.

"Ok, I understand." Replied Gohan as he breathed a sigh of relief. This might not be as bad as it seemed.

"So, with that being said, would you mind telling about that tail of yours or how you got those injuries?" Mike asked as he looked down at Gohan's furry appendage.

"I'd rather not get into that right now. Sorry, it's just that I've had a rough day." Sighed Gohan as he looked down at his bed in thought.

'There has to be some way to get back home.' Thought the boy as he started to tear up.

Noticing Gohan's actions, Mike decided to leave the room until the next day and that he wouldn't bring up Gohan's past again until he was ready to do so by himself.

A week later

The next several days went by very slow for Gohan as there wasn't much he could do other than just lay there and heal.

Mike and some other nurses and what appeared to be government officials occasionally visited him as well. Unfortunately, everyone but Mike kept trying to convince him to talk about who he is and where he's from. Not only that but they were only giving him human sized meal proportions.

They said it was something about not knowing enough about him. Gohan could tell they were very paranoid with him as they always kept a watchful eye on him when they were around him. Not only that but they had security cameras all over the room. But he couldn't blame them for it.

But on the positive side, Gohan felt as good as new. He even felt a little stronger now that he's healed due to his saiyan biology.

'All right. Now that I'm all healed up, I should be ready for any threats that might occur while I'm here. I just hope I can find some way home.' Gohan thought to himself as he stared blankly at the ceiling.

He had been doing that a lot lately. Ever since his second or third day here in fact. That was also around the time he came to the conclusion that he had somehow arrived in another dimension or universe. That was the only way he could explain the vortex and void he saw. It would also explain why he couldn't sense anybody.

At first, he had fallen into despair, which didn't go unnoticed by Mike or any of the other nurses. The military people didn't seem to care much though as they only questioned him.

He would have been glad to answer their questions but to be honest, he was kind of afraid to. They had essentially quarantined him from the world just for arriving there. There was no telling what they'd do if they found out anything about him other than him having a tail.

Speaking of his tail, while he was laying there, he couldn't help but to think back to the fourth day of him staying there when the nurses were examining his body to see how well he was healing, they grabbed his tail not knowing what would happen.

The ordeal was very uncomfortable for Gohan. Not only did he yelp out in excruciating pain but it made him feel as weak as he did when he had first arrived here in the first place.

This, of course, was quickly written down by the nurses and later on in the day, the military people came in to ask him if it was true. It was then that Gohan realized that these nurses worked directly under the control of the military people.

Just then, Gohan heard the door open to reveal Mike entering the room. But just one look from Mike's expression told him that something was wrong.

"What's wrong?" Gohan asked getting straight to the point to which Mike sighed.

"Well, I don't know how to explain this but since you're healed now, we've been told to stop attending to you after today." Mike began as he started unhooking the medical equipment from Gohan. It wasn't like they needed it anymore anyways.

"Isn't that a good thing though?" Wondered Gohan as he sat up in his bed. Then, with another sigh, Mike decided to continue.

"Normally I'd say yes. But... there's complications." Responded Mike as he finished unhooking Gohan.

"What kind of complications?" Gohan asked in a worried tone. He only hoped this wouldn't keep him from leaving.

"We were told that since nobody knows anything about you other than about your tail that it is too big of a threat to let you leave here until they know otherwise. To both the country and possibly even the world." Explained Mike as he sat down on a chair to look at Gohan. The only response he got though was Gohan looking down at the floor.

"Gohan, I need you to listen to me." Mike said catching Gohan's attention once more. "Gohan, they asked me to come in here try and get you to at least open up a little to me so that I can tell them about you. They asked me because out of everyone here, I'm the only one you seem somewhat comfortable and trusting of."

"Correct me if I'm wrong but that's because I'm the only one that didn't hound you down for answers and gave you some space. Which is what you wanted. Am I correct?" Mike asked knowingly. It had been hard to not ask Gohan any questions because not only did he have to deal with his own curiosity but he also had to deal with his superiors yelling at him for not doing so. But it had been worth it since it made Gohan a little more relaxed.

"Yeah..." Gohan answered back in a quiet voice. He wasn't exactly eager to tell them anything at all due to his fear of what they'd do to him but if he wanted any chance of ever getting out of here, he'd have to do it.

"I'll tell you just a little bit though if that's ok. To be honest, I'm afraid to but I will if it means I can get out of here." Declared Gohan as he looked up at Mike with a mixture of fear, nervousness, and determination.

"Thank you." Was all that Mike said. He then stood up and asked one more question. "Would it be ok with you if I bring in somebody else? They're the boss around here so to speak. He's the one who gets the final say in things around here so if anybody here truly needs to listen to you, it's him."

"That's fine." Gohan said with a small nod. With that being said, Mike then turned around and left the room.

It only took him about a minute or two for Mike to return with the General from a week ago close behind him.

"Hello there. I'm General Howser." Introduced the General as he came to a stop a couple of feet in front of Gohan.

"Hello General Howser. My name is Son Gohan. Son is my family name." Gohan replied in kind as he got up and did a small bow to the General.

"So, Gohan, Mike here has informed me that you are ready to talk to us about who you are. Is that correct?" Inquired General Howser while he looked Gohan up and down with his eyes. 'So the rumors of him having a tail are true then.'

"Yes, sir. That is correct." Gohan claimed in a formal tone. He definitely wanted to make a good impression. Besides, he was always taught by his mother to have good manners. Especially towards those of importance.

"Very good. First things first. Where are you from and why are you here?" Howser asked without wasting any more time. The time for answers was now. Gohan had kept him waiting long enough. He needed to know how big of a threat the boy was.

"That's the thing sir. I don't know why I'm here. All I do know is that this is not where I'm from. The last thing I remember before I arrived here was fighting a monster that was threatening my world before I was sucked up by some kind of vortex." Gohan explained eliciting a raised eyebrow from the general.

'Could this boy have been fighting against the octopus?' General Howser thought to himself without losing eye contact.

Picking up on the subtle clue from the General, Gohan decided it would be best to continue.

"After I was sucked up by this vortex thing, I found myself in some kind of void area where I saw something strange. I could see the recent events of my battle all the way up until I was sucked up. Then I saw something else but I couldn't see what was happening in it. The next thing I knew I was floating inside some kind of black and blue tunnel only to come out of it and land in what I'm assuming was an ocean." Finished Gohan as he watched Mike and General Howser to see how they'd react.

Mike looked like he wanted to believe it but was having a hard time doing so. However, General Howser just looked as stoic as he did when he initially asked the question. To be honest, it was kind of making Gohan nervous.

"I see. I have a couple more questions for you then. First off, what did this monster you were fighting look like? Was it yellow and have tentacles by any chance?" Asked General Howser. However, Gohan only looked at him in confusion before speaking up.

"No? What would make you think that? The monster I was fighting was an android named Cell. He was green and had bug-like features. Such as an exoskeleton and wings." Gohan told the men with confusion evident in his voice.

"Never mind that. So, what do you think that vortex and void stuff you were talking about was?" Asked the General while secretly hoping that maybe that is what they and the Americans had recorded on their equipment.

"Well... I'm not entirely sure but I think it might have been some sort of interdimensional portal or even a gateway from one universe to another." Gohan said earning varying looks of surprise from the two as they hadn't even considered that. But that raised another question.

"Wait, how can you be so sure? I mean, you've been in here ever since you even got here if what you're saying is true." Questioned Mike causing Gohan to shift his attention from the General to him.

"Well, you see, I have the ability to sense the life energy of individual people and other life forms. I can even sense how strong an individual is compared to another. Although very few people can suppress and hide their energies so they can't be sensed." Gohan explained causing the two to raised their eyebrows again.

"Would you mind if we test that out Gohan?" Requested General Howser. If there was any way to prove the boy's claims, this was the best way to do so.

"No, I wouldn't mind." Gohan said with a small smile. This was his chance to prove he isn't lying.

"Alright. Mike, I want you to take your phone and go throughout the neighboring rooms. When you get to each room, I want you to tell everybody to stay in their respective rooms and then tell me the number of people in each room. If he gets all the numbers right, that will prove he isn't lying that he can sense people." Commanded General Howser resulting with Mike nodding in agreement before he left the room.

The next few minutes were spent in an awkward silence as General Howser got the occasional text message from Mike. Until Mike finally reentered the room, that is.

"Ok, I'm back. Gohan, I checked all six of the nearest rooms that are all on this floor. Now it's your turn to do your part.

Gohan didn't say anything as he just nodded, closed his eyes, and reached out his senses. The closest room he sensed had three people in it. The second room had five people. The third and fourth rooms had nobody in them. The fifth room had three people in it. Lastly, the sixth room had eight people in it.

Then with some simple head math, Gohan tallied them all up to get a total 19 people.

"There are 19 people." Gohan said confidently as the two men looked from him to each other in shock. It kind of made Gohan laugh on the inside. He didn't show it though but he did allow himself to smile.

"That's amazing..." Was all the General could manage to mutter out. Mike nodded in agreement as he tried to get over his shock. All this praise was definitely causing Gohan to blush and smile.

"Gohan, you said that you were fighting a monster named Cell that was threatening your world before you ended up here correct?" Asked Commander Howser as he got over his shock and thankfully his question helped Mike do it as well.

"Yeah, that's correct. Why do you ask?" Pondered the demi saiyan as he tried to understand where this was going. Then it hit him. They wanted to know how strong he is.

"Did you manage to win against this monster? Judging from your injuries, you either failed or barely won." Surmised the General. This caused Gohan to sigh as he knew he should've seen this coming.

"Yeah, I beat him. Unfortunately, I had to kill him to do so though because he had the ability to regenerate and every time he'd regenerate from a near death injury, it'd make him physically stronger. However, it took the death of an innocent for me to build up the anger and strength to do it. But I toyed with him... and my dad had to sacrifice himself in order to save our world." Began Gohan as he started to cry.

Mike was going to say something but with a silent look from the General told him to allow Gohan to let it all out.

"It was all in vain though. Cell was able to regenerate even though everything but one single cell was destroyed. He then killed one of our friends and attempted to have a rematch against me. He even tried to kill yet another person but I had to jump in and block the attack. That's what injured my shoulder so bad. Then we clashed in one final attack and I managed to kill him by atomizing him." Cried Gohan as he let it all out while still trying to grab his bearings.

"I'm really sorry to hear that Gohan... You shouldn't have to go through something like that at your age." Mike said quietly. It was impossible not to feel bad for him. No child should be put through those kinds of hardships.

"I'm sorry to hear that too." Stated General Howser as he put his hand on Gohan's shoulder. "I'm sure your father would be proud of you for not only avenging him but for protecting your entire world."

"Thank you. I needed to hear that." Gohan said while wiping the tears off of his face. "I know you only asked because you want to know how strong I am."

"That's correct but I didn't know it'd be that emotional for you to bring it up. I'm sorry." Howser responded before removing his hand.

"It's ok. I'll tell you how strong I am though. I'd rather not say the exact limits of my power but I will confirm that I've far surpassed the strength to blow up a planet the size of Earth. Earth is the name of the world I'm from by the way." Gohan explained causing both men to be surprised yet excited and hopeful at the same time.

"Gohan, our world is called Earth too but that's not important right now because I have a huge favor to ask of you." Commander Howser declared as he gently grabbed Gohan's shoulders to emphasize the importance of his request.

"What do you need?" Gohan asked rather uncomfortable with how close the General was being.

"First off, I need you to promise me that this will stay a secret and in return I'll make sure your information stays a secret from the general population as best I can." Said General Howser without letting go of the boy.

"Ok, I promise but can you please let go of me?" Gohan awkwardly requested. Then, with a nod, General Howser let go of Gohan's shoulders.

"Ok, you see our world's moon had 70% of itself blown up by a yellow octopus-like monster. He has threatened to do the same to Earth at the end of the school year unless we kill him by the time. But the problem is the fact that he is presumable unkillable." General Howser began catching Gohan's full attention due to this threat.

Thankfully though he has decided that he would have one of the students in this one junior high school class try to kill him as he teaches them in both normal classes and in the way of assassination under the promise that he will not harm a single student in his class. What I'm asking is for you to join his class and kill him before he destroys the Earth." Begged the General as Gohan seemed to be the world's best chance.

He only hoped Gohan would say yes since he saved his own world from a similar threat but he wasn't entirely sure the boy would even agree to taking another life.

Gohan was silent for a moment as he took all of this in. He didn't want to kill this monster or anybody else unless he absolutely had to but he might be their only hope.

"I'll do it." Gohan said causing General Howser and Mike to smile as their eyes filled with hope.

"But only if I can't find any other way to make him back out of his threat. I'm generally a pacifist so I don't want to kill him. So, please let me try to find a way to get him to not destroy the planet. I promise that I will kill him if I can't find a way by the end of the year though." Explained the boy making General Howser nod reluctantly.

"I would say it would be better to do it as soon as possible but since you proved that you aren't lying to us about your abilities with our test earlier, I'll have to trust you. But we will still allow for the other students to attempt kill him before then just in case." Said General Howser making Gohan nod in agreement.

"So, when will I be joining the class?" Gohan asked while looking between General Howser and Mike.

"We have two other students scheduled to join the class but we are unsure if the second one is ready to join the class yet. If you want, we can have you join a few days after the first student joins. She will be joining the class in four days so how does a week sound?" Asked General Howser hoping that Gohan would agree.

"All right, I'll do that then." Gohan said with a smile.

Well that's it for this chapter! I hope you enjoyed it! Anyways, I just wanted to let you all know that even though I'm starting another story and will start other stories, that doesn't mean I'm not going to update the stories I've already started. I just want to start off some of the ones I've got planned. The next time I post though, it MIGHT be an update for Humanity's Last Hope. Either that or it'll be the first chapter for another story. Well, I'll see you all next time!