[Published: November 9, 2015 on Wattpad]

OMG I just saw Pacific Rim the other day [like a few months ago, yeah, I've been writing this story for a while] and it was amazing! So before that I watched a audioplay of Attack on Titan and Pacific Rim crossover [Aka, Attack on Kaiju by the AOK Team]. And then I read a ton of fanfics as well. Now I'm making my own! Also this is a Ereri/Riren story, don't like, then leave. I don't wanna deal with hate and other shit! Anyway, for others enjoy!

Summary: In the year 860, the last titan was killed by humanity's last hope, Eren Jaeger. In the same year, on the same day, Eren suddenly disappeared after a strange creature emerged from the ocean and devoured him before vanishing back into the ocean.

1160 years later [Year 2020], the bridge was finally closed and humanity no longer lived in fear of the Kaiju. Gypsy Danger along with her pilots Raleigh Becket and Mako Mori went down in history as the two who saved the world from the kaiju.

180 years later [Year 2300], the bridge once again opened for an unknown reason and Kaiju surfaced again. Using the same technique that Gypsy Danger used they tried and seal the portal once more with a similar built Jaeger. The plan resulted in a failure.

40 years later [Year 2340], the Scouting Regiment is back, but reincarnated into the modern era with no memories of their past with them. One day, three kaiju suddenly emerge and the Jaegers are dispatched to deal with them. When a fourth one suddenly shows itself and is bigger and more powerful than any other kaiju ever seen and to massive for any Jaeger to take on. Humanity believed the end had finally come and were beyond shocked when the kaiju began attacking other kaiju with killer intent. What was even more shocking was when the massive kaiju collapsed and from the nape of the neck appeared a teenager. How did Eren suddenly gain this power? Is he the key to fighting the kaiju? Also if he's so old, why has he never aged!?

Location: What would become California

Year: 860

"This is the last one!" Eren yelled happily. Finally, after humanity's futile battle, the Scouting Regiment had almost taken everything back from the ones they used to fear. All that remained of the titans was one titan. If Eren succeeded in killing it, then every titan would be dead, besides the titan shifters of course.

Closing in on an abnormal titan which seemed to be running away. It seemed to be heading towards the ocean for some odd reason. Eren pushed that thought aside as the titan raced across the sand and towards the endless expanse of water. Pausing for a second and staring at the waves as they brushed the shore lightly. The sun reflected off of the clear water. It was one of the many things he wished to see in his lifetime.

"Focus Jaeger!" Levi yelled from behind him.

"Sorry Sir!" Eren replied immediately. It was pretty obvious that Levi noticed he was spacing off.

Concentrating on the titan again, Eren noticed it was to far out on the beach and his 3D maneuver Gear would be useless on the flat surface of the beach. Growling in anger slightly he knew he only had one choice. Spring himself high enough into the air and hope he made it to the titan.

Leaning back almost all the way he detached the hooks from their current tree and latched them onto the highest point he could find that was stable. Reeling himself toward the two branches which he latched onto, he snapped the hooks back and fired himself into the sky. His eyes locked onto the titan and he aimed the hooks for the neck. Seeing that he aimed slightly off to the side, he figured he'd have to do a side attack. Leaning to the side slightly he adjusted his weight to make himself somewhat curve. Bring his blades to his left side, he prepared to land the final blow. A loud battle cry emitted from his throat as the blades connected with the titans flesh. The chunk of flesh flew away as the titan fell to the ground with a huge thud.

Eren landed on the sand and smiled happily. "Finally, we're free." The titan-shifter heard Levi say behind him. Eren nodded happily as the other stood beside him.

He could also sense the others approaching as he watched the waves brush against the shore.

Levi reached out and gripped the titan-shifters hand. Eren looked over at him and smiled. Folding his fingers around the older male's hand and brushing against the silver ring that rest on Levi's hand.

Grinning like a complete idiot he pulled the other into the salty water without warning.

"Great, now I'm filthy and wet." Levi grumbled as Eren just laughed.

"So?" Eren said through his laughing fit.

Though he had never learned to properly swim, he still tried his best and as usual the second Mikasa stepped into the water, she swam as if she had been doing it her whole life. Armin was excited and he and Hanji were analysing the water and talking about other sciency stuff, which Eren didn't care enough to listen in on.

The next few hours were just pure fun and games. Races, ball games, swimming contests and sparring on both land and water.

On the surface everything looked fine, but underneath the water was another story. A strange beast shifted through the water attracted to the actions above land. It was black with purple glowing stripes and spots. Two large horns stuck out forward and it's feet were webbed and perfect for swimming and it's massive claws made it also able to fight just as well as it could swim. Six red beady eyes covered by nictitating membranes scanned everything around it. [Also fun fact, Eren's titan form also has this membrane!] Six wings rested on the massive beings back. It appeared dragon looking and it's teeth were shown and the thing had a skull looking face. Purple and black scales covered its body. Strange blue slime leaked slightly from it's mouth as it approached the coast.

Drifting slowly in the salty waves Eren held into the log he found.

"Hey, Levi?" He asked the black haired male who was just floating next to him on his back.

"What?" Levi replied rotating so he was facing the teen.

"What happens now?" Eren asked. "I mean, we killed all the titans and all."

"That's an easy answer." Levi replied closing his eyes and leaning back slightly in the waves. "Explore the world for any more threats and to just explore it."

"I know that!" Eren exclaimed. "I meant what about us." His thumb brushed against the ring on his left hand. Reading the kanji over and over in his head he hand already memorized every curve and detail of the symbols and could write it perfectly in his sleep.

"You like the beach right?" Levi earned a nod from the titan-shifter. "Then why not build a house on the shore?"

Eren's smile grew even wider than Levi thought possible. "I'd like that!" He grinned.

"Then let's head back to the others. It's getting late and I need to clean myself off." Levi said as he began to swim towards the shore. Mikasa was waiting on said shore just making sure nothing happened. Everyone was used to her over protectiveness and no one questioned it. Eren sighed at his foster sister and slowly made his way back to the shore. Spinning around once more in the water he watched as the sun vanished over the sea. Shades of red, orange, yellow, and pink dotted the sky as night fell.

While Eren watched the sunset Levi had just reached the shore and grabbed a towel from the stack that Hanji left out earlier.

"Oi, shorty!" Mikasa yelled as she approached Levi.

Not allowing her nickname ruin his good mood he sighed. "Do you need something, Ackerman?" He asked with the same emotionless tone he had towards almost everyone.

"Was there a huge fish in the water with you?" She asked pointing to the ocean and near Eren, as he continued to swim back.

"No...?" He replied looking to where she was pointing. "That's not a fish..." Levi added noticing the size of the thing.

The two exchanged glances as Mikasa broke into a sprint to and grab her ODMG.

"Eren!" Levi yelled as loud as he possibly could. His voice even cracked slightly, though he would never admit it. "Get out of there NOW!"

Hearing Levi's panicked yells he glanced behind him as the thing sprung from the water and stared down on him. Opening it's mouth it let out a terrifying roar towards the titan-shifter that blasted him several meters towards land. "What is that thing?" He asked before swimming as fast as he could towards the shore. His arms and legs soon became exhausted by the movements. Also jumping in with his military uniform wasn't the smartest idea either as the straps restricted some of his movements and the uniform was meant for fights not swimming.

The sound of wires reached his ears as he spotted Mikasa flying through the sky and aiming for the things eyes. Continuing on his way he knew she could only buy him enough time, and it wasn't to hard to figure out it was after him. Eren wasn't certain why to be honest.

Pulling himself up the sand he was almost hit with his gear as Levi tossed the metal contraption at him. Nodding his thanks he snapped the gear into place over his wet clothes as Levi took to the skies. On his way to engage the monster he spotted a random soldiers abandoned gear which was carelessly thrown aside in the activities. Rummaging through everything he found a smoke flare. Not caring what color it was he fired it into the sky as a trail of black smoke followed the canister.

A few other smoke flares appeared in the trees as everyone was alerted to the new threat. Running towards the being he leapt into the air and his grappling hooks attached themselves to the monsters sides as he looped around it and hoped it had the same weakness as titans. Flying higher he aimed at it's neck.

"Eren look out!" He heard Hanji yell from the shore. "It's intelligent and it's after you!"

"I know that!" Eren yelled since even though Mikasa and Levi posed more of a threat, it always was looking at him with at least one eye. Then he realized why Hanji told him to watch out. A massive tail swatted him from the air and he was sent crashing into the water. The beast dived into the water and followed after him. Mikasa and Levi lost their grip and were also dragged into the water.

Eren knew he couldn't open his eyes or else he wouldn't be able to for a while due to the salt. That's didn't mean he couldn't fight though. Bring his hand to his mouth he bit down hard and an all too familiar flash of lightning appeared. The water was only around fifteen feet deep, so he could easily fight in the 'shallow water' though to a normal person it was pretty deep. The thing emerged from the water and roared at him, which Eren wasn't sent flying from. Letting out his own roar he ran forward and hit the head of the dragon head on. Without leaving room for it to counter he leapt into the air and kicked with with both feet and sent it back a few dozen meters. Rushing it again he forgot about the tail and was reintroduced to the appendage.

Levi and Mikasa had made it to shore as the rest of the Scouting Regiment arrived. It was obvious this fight was not longer within their league. It was fight between Eren's titan form and whatever that was...

"Kaiju." Hanji said breaking the silence.

"What shitty-glasses?" Levi asked glancing at her.

"That's what I'm calling the thing." Hanji replied as she grabbed some random persons notebook from the shore. Flipping to an empty page Hanji began to doodle and take as many notes as could possibly fit on the pages. At the top of the scribbles that were supposed to be letters was the word Hanji picked for the name of the new species: Kaiju. Who gave Hanji the right to name the species, well no one really. Though Hanji's discovery would change the world along with the legend to follow later.

"What's the weakness of the 'kaiju'?" Levi asked crossing his arms as he waited for the squad leader's reply.

"It's not that simple." The titan enthusiast replied. "I need a long time to figure that out!"

"We don't have a long time!" Levi replied losing his patience due to the fact Eren didn't seem to be doing much damage despite all of his attacks. The kaiju barely seemed fazed by the attacks.

"This is a battle between titan and kaiju." Erwin said coming up from behind them. Was that supposed to make Levi feel better? Leave it to Erwin to only worsen the situation.

Eren crystallized his knuckles and the fronts of his legs and feet and smashed the creature with everything he had. Kicking and punching it without even a window for a counter attack. The kaiju took every attack head on and made to move to even try and stop the titan. It just took on every attack and once one attack was done it waited for the next without moving to dodge or counter. Eren assumed he smashed it's head so hard it was brain dead.

Bringing his arms above his head he brought it down hard on the kaiju and smashed it into the water with every ounce of power he could muster.

Making his way to the beach not to far from where the kaiju's body was Eren's titan form collapsed and began to evaporate. It was one of the rare times that he used all of his energy in titan form. Another time was his fight with Annie and when he first turned into a titan. Landing on the sand he was meet with multiple questions at once and compliments and more questions.

"Give the kid some space!" Hanji ordered pushing everyone out of the way as the crowd grew quiet very slowly. "What exactly happened?"

"I was just swimming back to shore when the thing appeared." Eren replied. "The rest is pretty apparent." Seeing and Hanji and most of the regiment were there during the fight he didn't need to explain anymore.

"We're calling them kaiju." Hanji commented and then headed towards the said being to investigate it. Unlike titans it didn't start to evaporate, which Hanji was thankful for.

Before the crazy scientist laid a hand on the monstrosity it's eyes, which were earlier partly closed, snapped wide and the nictitating membranes went over the red eyes. It bore into the squad leader and everyone within twenty meters of it panicked and began yelling and screaming. They knew their blades were useless and only Eren could beat it. What no one accounted for was that Eren was so exhausted he couldn't even stand much less fight.

The kaiju ignored the screams and directed it's eyes onto Eren. Mikasa stood in front of him as Levi stood to his side and helped him to his feet. The beast opened its massive maw as it planned in eating them all.

'It's only targeting me.' Eren thought as he stared into it's eyes. It only looked at him, not the others. 'Then I only have one choice.' He thought as he placed a comforting hand on Mikasa's shoulder and held Levi's hand in the other. They both thought he was just assuring them they would survive, but that wasn't his thoughts.

"I'm sorry." He said as both stared at him confused. Just before the beast ate them he pushed Levi and Mikasa out of the way at the same time. The teeth of the kaiju dug into the sand and closed shut locking him in it's mouth. Though the kaiju didn't swallow him or crush him between its teeth. "Please forgive me." He cried as he felt the kaiju move away from the voices of fear, sadness, rage, confusion, and the voices of his friends.

Little did he know that on his 1400 birthday, 1380 years after he was presumed dead, Eren would once again be called on to save humanity for the second time. A future no one could predict, a destiny no one could see, a teenager with the whole world on his shoulders, and a goal.

Hope you guys liked it! Also as I mentioned earlier this is a Ereri/ Riren story. Don't like leave or ignore the ship. There isn't going to be and lemons or smut, so don't get all freaked out if that's what you're worried about. One more thing, please wait a month before you comment "update please!" It's pretty annoying and I kinda have a life outside of Wattpad... Yeah... I also tried my best to not refer to Hanji as a girl or a guy because Hanji's gender isn't defined in the manga, so I'm sticking with Hajime Isayama's idea of letting the reader decide. Anyway on that note, cya guys next time!