I would recommend not to read this if you don't want spoilers for attack on titan.

Trunks said "Sorry to say this but no. I will be the one doing the telling. First off, fight me. I want to see how well you've been keeping up with your fighting."

Gohan said "Uh, sure why not. My powers are far beyond when I fought Cell. I'm pretty sure I need super saiyan at most. Prepare yourself. One question though. How long has it been since the fight with Cell?"

"7 years."

Trunks said with a smirk "No. Prepare yourself. I am nothing like how I was back when I had fought Cell."

Gohan taunted him "You better be. After all, we don't want a hole in Vegeta's trunks."

"Why you!... Oh, I see… you're trying to make me mad…"

"You caught on so soon… No matter, give me all you got. Meanwhile, The rest of you guys train while I spar with Trunks." He looked at Trunks, "LET'S GO."

Gohan disappeared and came up at Trunks face. Trunks simply disappeared and reappeared right behind him. Gohan, in his normal form, barely dodged it. "Nice! Seems like you really did grow strong."

"I have been training for 7 straight years because of him. Here take this. HA!" Gohan dodged it but trunks came behind Gohan and shot him with another Ki blast.

Gohan said "Ok I'll go serious." He and Trunks clashed . Gohan transformed into a super saiyan and punched Trunks in the Gut.

Trunks spat some blood and turned super saiyan too. He then placed his hand on Gohan's face and turned super saiyan 2 and shot a ki wave.

Gohan turned super saiyan 2. He thought to himself "Damn. He became so strong. He is stronger than dad and vegeta right now. I wonder if I can take him down with them. No… I don't have a 100% control over it. Oh I know, time to use magic."

"Hey Trunks! You want to see magic!? Here! Lightning flame dragon's… ROOOAAARRR!"

Trunks went airborne and wondered how Gohan did that. "ICE MAKE ICE SWORD." Gohan caused truns to draw his sword out.

When Gohan and Trunks sword collided, Gohan mumbled "Gotcha..." He froze Trunks Sword by turning his sword into Goku heavy Ice, and placed his arms on trunks and shot a one hand Masenko.

Trunks fell back. Gohan walked calmly towards him. "I wonder? What happens when you fuse Ice with Energy? I wonder what happens if I fuse that with Lightning Flame? I wonder what the damage would be? I wonder..." said Gohan as he walked towards him performing what he said.

Trunks said "What? Ice and flame doesn't die out? It must be the energy inside the Ice." Gohan placed his hands in front of himself and shot it straight to trunks. He shot it and trunks tried dodging it. What he didn't know was Gohan's attack was guided.

Trunks managed to blow it up with a move passed down from his father, Galick Gun. Gohan came from behind and performed his own move "Divine Magic : Judgement of the Saiyan."

Trunks was wounded but not out of the fight. Trunks said "Hey Gohan… I think I found a level beyond super saiyan 2."

Gohan said "Go ahead. I can tell if you ascended the ascended super saiyan"

Trunks had his hair grow all the way to his shoulder, he had huge buff muscle and didn't lose his speed too. Gohan concluded this is a level beyond super saiyan 2 but not a super saiyan 3.

"Hey Trunks. You went super saiyan 2.5 but not a 3."

"How would you know?"

"I would know because of this." Gohan transformed into a super saiyan 3. Trunks was amazed. He said "Come at me Bro!"

"Gohan moved so fast, it looked like he used instant transmission. Trunks turned and Gohan flicked at his forehead. Trunks went flying all the way across and skidded to a stop. He got up and Gohan punched him in his stomach making Trunks turn back to normal.

"Incredible, Gohan." and then he went unconscious. When Trunks came back to his conscious Gohan asked him to explain why he wanted to fight.

"You see I wanted to test your limits so I can compare it with them. The supreme kai contacted me before and told me there is a monster called buu. An evil guy called Babidi came to revive him back when I was 7, but he couldn't find any strong power level on Earth. He went to other planets and absorbed energy. Supreme kai told me of that and turns out, the monster is revived. He might look like a kid but trust me, he destroyed thousands of galaxy. Supreme kai told me he is stronger than himself in your timeline Gohan. Earth is next. I had to train vigorously everyday after finding out about Buu. Mom helped me get here to get you to come to our world to end him. He is also just one of our problems too."

Gohan said "Some story. Sorry to tell you this but we can't return. This place is a place where I have been trapped for 2 years. In my world however, It's been 2 days."

"Trunks, I request you to join my branch and will you accept?"

"Sure"

"Great. You will be my Second in command."

Gohan explained everything that happened to him since he has been here. Wendy came over and said "Hi, I'm Wendy."

"Are you by any chance Gohan's Girl?" Trunks whispered.

"No sir!" Wendy said as she turned red as a tomato.

"That's too bad. I thought the two looked cute together."

Wendy was blushing even more by now. Trunks stopped. The next few days they trained.

1 week later…

"What? Commander Erwin wants to talk to me? Well then, ok sure why not."

Gohan went there with trunks and Erwin with Levi. Only Levi and Gohan were to talk.

"Gohan. There is something called the female titan. It's just like Eren, she can transform. I knew that for quite a while now. Now I found out there is another beast which is here as well. He… He has inhuman like appearance and power. If he wants, he could destroy the world easily. I say he's on the same level you are Gohan."

"Commander Erwin, would you mind telling us how the beast looked like?"

"He looks like a kid. Completely pink, wears no top and a belt with a M on it. It has holes on his head and his eyes instead of white is black and his pupils is reddish pink."

Gohan sensed Trunks power rage all of a sudden. "Hey Erwin, I think I should deal with Buu. the ones under my command shall help too. The rest, however, will aid you in killing the Female titan."

Gohan and Trunks started training with each other. There was a rip in dimensions. Gohan, Trunks and the Squad leaders and their 2nd in command were sucked into it. Trunks and Gohan found out it was a place where time slows dramatically.

Everybody trained with each other. Natsu and the others were introduced to a level beyond human, the super human.

Erza said "What! a Super human?"

Gohan said "Yeah. It is just theory though. Try channeling your power into your hair using anger. Try to change your aura into a much stronger one. Males should try filling your muscles with energy while girls focus on their hair standing up."

By the time they were done with their training, Gohan Grew back his tail and Trunks finally did too even though they had no idea how it happened. Trunks can transform into a super saiyan 3 thanks to Gohan. They headed back. to their own world. Where they were, 3 years had passed while only a few months had passed in the AOT world.

Gohan said "What Mikasa? Annie turned out to be the Female titan? You are the Sub-Commander?"

Mikasa explained everything that happened. Lucy and trunks were introduced around.

They were all deployed to take down the Colossal, Armour and and buu, and help Eren seal up the wall. By this time, Natsu and the others surpassed and the others went to help seal up the wall.

The titans didn't appear even after Eren sealed it up.

Armin found out the titans were inside the wall. The Armour, Colossal, the Beast titan and buu. Gohan commanded, "Natsu and his squad shall go against the Colossal, Erza's against beast and Gray's against Armoured. Eren shall head towards the titan swarm with everyone else! Me and trunks shall fight the pink creature."

Trunks said "Long time no see buu. Me and Gohan will fight you but we will chose the battle sight."

Buu agreed surprisingly and left.

"It's a good thing I learned Fusion and ssj3 with you Gohan. We can take him down no problem."

"Good thing Buu train. Now Buu kill you easy. HAHAHAHAHA!" said Buu

Both Gohan and Trunks turned ssj 3 and came at buu. Gohan punched Buu in the Face and Trunks kicked buu in the face. Both fought each other for a while. Buu turned from Pink to Orange and then Pink.

"Buu turned from Buu 1 to Buu 3. Now Buu KILL KILL KILL!"

Gohan and Trunks agreed to take care of this quick and fused. Ssj 3 Gohanks spent all their energy in one attack. MASENKO FLASH (Masenko + Final Flash) .

Buu was Eradicated. The Beast titan said " Here. All the titans from all around the world gathered in one place shall come to kill you!"

Just then, They saw a few familiar faces coming to assist them. It was Laxus, Makarov, Gildarts, Gajeel, thunder legion/ Thunder god tribe, Shadow gear and many other fairy tail members come to help the fight. Gajeel said to Gohan "Hey Gohan, I found a place where I can train while stopping time. I have grown unimaginably strong, I also trained Gildarts Makarov, and Laxus. In the end, all surpassed me."

If it wasn't for the military branch the Saiyan's might, and fairy tail's assistance, the battle would be lost.

Gajeel told them if he combined his Iron magic with Energy, he can teleport to different places.

Eren's group and Gohan's said their goodbyes and stuff. Gajeel said to Happy "Hey happy. Carla is still alive. It seemed she died but turns out, she teleported to lamia scale and sherlia healed her."

They all headed back. Eren and Mikasa said if they needed help, they will try to help him.

Trunks decided to head to fairy tail with Gohan.

As they opened the doors of fairytail's gate, Gohan and trunks sensed something which died out pretty quickly.