Please take note, this is an AU version in regards to similarity of the 2k12 fandom.
I am no professional when it comes to story writing, especially since I am solo making this. Please understand.

Please take note that TMNT Dimension Nether will also be full of Angst, injury, suspense, action, drama, adventure semi-romance and family related close relationships regarding sensitive emotional caring for one another. In a way, this is your warning if you can't tolerate these kind of genre's.
If you want to know more about it, I recommend viewing it via DA!

(Violence, Gore, Blood, Drama, Action, Adventure, Strong/Subtle language, Comedy, Martial Arts, Family, Fantasy, Angst, Supernatural, Killing, Death, Semi-Romance.)
Content: 16+ (Rated M for Mature)

For your safety and mine, These AU designs and story belong to me, do NOT take em! Fanart is totally fine, but please all I ask is to credit both me and Nickelodeon. These are still the 2012 based characters, and they still rightfully belong to Nick.

Main warning, this story focuses on April n' Leo. Don't like these two together, then this is your warning!

Enjoy!


Chapter 1: Encounter

"MIKEY!" The yell could be heard from within the dojo where both Leo and Splinter were interrupted by their meditation.

Leo sighed and stood up, "I'll go see what's-" Leo was saying only to be interrupted by Splinter. "You and your brothers may go top side tonight, but only if you follow a few guidelines I will display and explain to you all, so retrieve your brothers and bring them here please." Splinter didn't hesitate at all from this sudden allowance that shocked Leo slightly, But Leo didn't question him and just nodded as he walked out the dojo.

"I AM SO GOING TO POUND YOU INTO THE GROUND!" Raph was yelling at the top of his lungs who was chasing Mikey around the lair. Mikey drew on Raph's face with an expo marker while he was passed out on the couch, it was the first noticeable thing when Leo walked out noticing the ruckus happening.

"I'm Sorry Raph, there's nothing else to do around here! I am bored!" Mikey screamed frighteningly as he ran from Raph. "Oh I will show you boredom!" Raph yelled back at him picking up the pace.

Leo only sighed walking over to the next spot the two brothers would run past, he lifted his right leg a bit which as soon as Mikey came over noticing too late had tripped over Leo's leg. Leo caught Mikey by the shell before he face planted to the ground, and Leo put a hand up for Raph next and Raph had instantly ran right into Leo's hand face first. "Are you two done? Because Splinter wants all of us in the dojo now, we're going Top Side in a few minutes. So you will not be bored any longer Mikey." Leo said smiling at Mikey.

Raph growled loudly rubbing his nose and wiping his face because of the marker. He couldn't really argue with Leo, let alone Splinter, so he growled louder and mumbled curse words as he walked towards the dojo. Leo had let Mikey loose. "Were going top side, finally!? OH YEAH!" Mikey yelled happily following Raph towards the dojo. Leo looked towards the lab where Donnie most likely was, either passed out or working on science stuff. "Donnie?" Leo asked as he peeked into the lab from the door. "Eep! Leo!? You scared me, I heard the guys fighting outside hoping they wouldn't come in here…" Donnie said frightened who was hiding behind his computer desk.

Leo walked over to him and reassured him everything was ok and that everyone was needed in the dojo. Both Donnie and Leo walked out of the lab and into the dojo where Raph and Mikey were already sitting on the ground in front of Splinter who insisted they sit alongside them, which they did.

"Now, my sons." Splinter had started as the turtles were aligned next to each other, ears open. "You all are now old enough to the point I have decided and will allow you all to go top side starting after this explanation and guidelines. First, Leonardo will be in charge at all times, no exceptions." Raph growled angrily lowly needing to have Leo bossing him around. "Raphael!" Splinter yelled slightly loudly and glared at him angrily. Raph instantly shot up straight, stopping and began listening again. Splinter sighed and continued.

"My sons, the top world is very dangerous. And I am sure Donnie is aware because of the media of many incidents happening and being posted worldwide. Before you all leave, One, I want you all to always stick together and work as a team. Two, stay in the shadows. Three, do not expose yourselves to anyone. Four, be home before dawn." Splinter had stopped and concluded his few rules, he had way more but he knew that his sons knew what they had to follow and do. All the turtles stood up and shouted "Hai, Sensei!"

All the turtles booked it out of the dojo, equipping their weapons and gear before running up the stairs and out of the lair. Splinter had reassured them out as they left.

"How long do I have to stare at your butt, move it Mikey!" Raph yelled waving his hand in front of his face on the ladder as they were exiting a manhole. Mikey exited the manhole following Leo who had exited first, Raph and Donnie came out next. "Dude's the outside is awesome!" Mikey said all excited and looked around checking everything out in the alley they were in. Donnie quickly was behind and clinging to Leo who was scared of anything new regarding surroundings due to people. Mikey instantly jumped at the sight of a human on their phone across the alley. "Dude's I am so gonna go say hi!" Mikey began to walk towards them. "Mikey don't! You heard what Splinter said about exposing ourselves to anyone." Leo snapped at Mikey who apparently didn't listen at all. "Haha watch me! He's just gonna see I am some normal dude coming to say hi!" Mikey quickly jogged on over to the human. "Mikey!" Leo shouted lowly at him who didn't dare follow because of the human. Raph started to smirk and giggle slightly "This is so gonna be good." He exclaimed.

Mikey approached the human closer and shouted "Hiya!" waving his hand walking past the middle of the street. The human man instantly turned around and saw Mikey approaching him, but it wasn't what Mikey was expecting. The man instantly screamed in fear throwing his phone in the air and running in the opposite direction away from Mikey. Mikey was left standing at the edge of the sidewalk in confusion. Leo sighed "I am so getting it from Splinter…" and face-palmed, Raph couldn't help but laugh.

Mikey came back to the alley with a sad look on his face and didn't dare look at any of his brothers because he knew he was in trouble. Leo looked up at the buildings and knew at that second they had to travel by rooftop to stay out of sight of humans. Donnie had calmed down a lot and adjusted to the top world a bit after what Mikey had done but he still stuck close to his brothers. Leo pointed to the roofs "We're gonna travel from the rooftops to stay out of sight, and Mikey… Listen to me next time or it won't just be me you get a scolding from." Leo glared angrily at Mikey who whimpered lowly but nodded in agreement to Leo because he wasn't wrong.

All the turtles looked at the roof, Leo was the first to jump from the railings and ladders and wall run up to the roof, the others quickly followed. Once they all reached the top and stood next to each other, Leo pointed in a general direction to where they would go to start exploring.

A large sigh had escaped April's mouth, who was exhausted after a long trip two hundred miles out of the city. She had just arrived to New York City, exiting the train carrying a backpack and decently large bag on wheels. She was here to start a new life, a life of her own and one at the age of only seventeen. She had graduated early and knew just about enough to make a living of her own, but she wasn't expecting it to start in such an expensive populated and crowded city area in an old apartment that her parents owned and was left empty.

April had let out another small sigh as she continued towards the exit of the train station, dragging the bag behind her all tired like. She had walked up the stairs and ended up at the busy streets, she had to walk to the apartment due to not having a car or the money at the moment for a taxi. She had heard a lot of rumors of New York being full of criminals and muggers, along with mysterious anomalies that have been happening and so called ghosts and ninja's killing or injuring people. She didn't hesitate to take into consideration that these rumors though are true as most of it had proof of deaths happening randomly in alleys and bodies being found with unknown caused injuries, Especially with how populated this city was. And it was already dark out.

April pulled out a small map from her pocket that her dad had given her to direct her towards the apartment from the station. She looked down at back up at a few times before moving along the sidewalk and reading the street signs for street names. April was getting annoyed because her dads writing and drawing was never the greatest, she kept flipping the map in different directions trying to read some of it but thankfully she could understand most of it and found the street she needed to be on and head towards.

A scream could be heard in the distance, it wasn't too far from where April was walking and she jolted to a frighten stop and looked in the general direction it came from. Good thing the street she was on was somewhat busy with people so not much abnormal activity happened here. But she couldn't get the urge to go check it out to go away, she found a spot to hide her large bag and come back later hoping no one would come across it. April had learned some self defense fighting when she was younger to this day, considering she was a straight up A+ student and always had free time on her hands, so her parents would allow her to learn self defense and practice herself outside the house and in the woods, especially for such a dangerous place to start a life in.

April darted towards the scream she heard as it happened a second time, she came across a pretty dark alley with barely any lighting, a perfect place to take advantage of for mugging and murdering. She walked up to the alley, noticing two guys pinning a young girl against a wall flirting with her and abusing her, one was also holding her purse away from her chuckling. These guys were muggers, and selfish one's at that too. "Hey!" April yelled standing in the opening on the alley, the men turned and looked at her in sudden surprise. "Leave her alone, let her go, and I won't tell anyone about what I saw tonight. Especially your faces." April angrily exclaimed with her fists to the side ready for anything. The men laughed loudly "Oh look, someone has come to rescue you darling." One of the men said chuckling and then clicking his tongue making a small whistle sound. A dark figure was approaching out of the depths of the alley and more into the light, it was a huge large man with a very upset look on his face and many many scars. He walked up to April and stared face down directly into her eye's. April instantly regretted coming to check out and stop whatever was happening here, she wasn't expecting a muscular and large strong looking man to come across so soon.

The turtles jolted to a stop when they heard a scream not too far off, but also instantly turned towards a loud sound right in their ears. Raph, Donnie and Leo stared at Mikey who was standing and eating chips loudly, not even paying any attention to the scream that the rest of them have heard. "Mikey!" Raph yelled, slapping the chip out of Mikey's hand that he was about to eat. "Hey! My chip! What the heck man!" Mikey sobbed at the fallen chip on the ground. "Did you seriously bring chips with you!?" Raph yelled glaring at him angrily. "Well yeah! I needed some sort of snack for the adventure!" Mikey said, giving Raph an angry look as well to mock him in some way. Raph was about to aggressively snatch the chips from Mikey only to be stopped by Leo.

"Enough you two, we got something more important." Leo said, he pointed in the direction the scream came from that everyone but Mikey knew what he meant. All the turtles ran and jumped from the roofs to a dark street with barely any lights in it, the screaming had stopped for some time now but since they were closer they could here whimpering, mocking and laughing in a nearby alley. "Hey come on! Leave her alone!" April yelled at the two men who were still pestering the young girl after five to ten minutes since arrival. April was pinned against the wall on the opposite side of the occurring incident by the large man and she knew she was next for the picking. The men ignored her and continued their teasing, mocking and flirting and usually would slap or punch the girl who began crying and whimpering as she had no energy left for more screams.

"I am so gonna beat all of them up." Raph mumbled loudly as the turtles peered over from the roof witnessing the incident happening. "Hold on, Raph. I'll deal with it." Leo Said and he turned over to Mikey who was still munching on chips but more silently this time because of how close they were to the incident. Mikey stopped and looked back at Leo and was confused. "Mikey, can I borrow your gusari chain?" Leo asked. "Uh, sure…?" Mikey said back and reached into his belt grabbing his Gusari chain, handing it to Leo. Leo pulled out one of his Tanto blades from under his hand armor plates and flipped it to the point of holding it by the blade and aiming it. Mikey crunched a chip loudly on accident but wasn't loud enough for the men below to hear, but it sure did piss Raph off. "That is it!" Raph yelled lowly and jumped at Mikey attempting to take the chips. Donnie sobbed at the two and shackenly asked them to stop. Leo ignored what was happening behind him and more below him, he threw the tanto at the larger man holding a young orange haired girl directly in the man's foot. The man screamed in pain letting the girl go and backed off grabbing his foot crying in pain, the other two men instantly stopped and looked over at what was happening and was about to rush over but Leo swung and threw the Gusari chain at one of the men as he jumped off the roof and into the darker part of the alley so they wouldn't see him and yanked the man into the alley towards him, knocking him out.

April was too much in surprise and shock at what was happening. But instantly knew it was a ninja at work due to the weapons and movements, she took advantage of this moment and rushed to the injured girl who was laying against the wall crying silently from the pain, She stayed next to the girl as the muggers were being dealt with by the unknown person at work. The other man who took part of it was freaked out and scared and was about to book it out of the alley but Leo didn't hesitate to not let him escape and the chain reached and wrapped around the man before he could exit the alley, where he also pulled him in and knocked him out tossing him on top of the other guy. Leo noticed the larger man look over but was still slightly crying, he was pissed. Leo started spinning the chain beside himself as the larger man stood angrily and rushed towards Leo yelling, "Strong silent type, huh?" Leo mumbled. As the man approached the shadows, Leo threw the chain and wrapped it around the man's leg, and wrapping it around his own, Leo flipped, pinning the chain down with his foot to add more strength to the chain to cause the man who seemed to weigh over a few hundred pounds to fall off his feet. The man gagged in surprise as he became unbalanced and almost fell but managed to grab the chain that Leo had already let go of, the man looked around frightened as he had disappeared. Leo jumped from the ladder of the wall and onto the man's shoulders, forming his hand into a solid fold and slammed the side of his hand into the man's neck causing him to pass out and collapse. Leo quickly jumped off and grabbed the tanto in the man's foot and the gusari chain before jumping up back towards the roof silently.

Leo climbed over the edge and jumped back onto the roof noticing Raph and Mikey were still fighting and Mikey still had the chips in his possession. Donnie had given up already to try and stop them and was sitting just watching them. "Alright, enough!" Leo yelled at them as he placed his tanto back under his hand armor. Raph and Mikey instantly stopped and looked at Leo who seemed pretty serious, Leo tossed Mikey's Gusari chain back towards him, "Time to go, now." Leo said taking the lead back towards the manhole they came out from to go back home. Mikey crunched a chip loudly as he tucked the chain back behind his belt and followed behind the others.

April looked up towards where that ninja had fled, she turned towards the hurt lady reassuring her that everything was ok now and help was on the way as she could hear sirens approaching them finally, so someone nearby must've called after hearing all the yelps and screams from being attacked. April ran up towards the ladders on the side of the building that led up to the roof, climbing up she reached the top and looked over to double make sure the police and ambulance were arriving, which they did as two cop cars and one ambulance pulled in the alley. "Ok, good." She mumbled as she turned to look around on the roof for anything, and she did find something, a chip. She also noticed there was a trail of them, small one's mostly, so whoever was eating them wasn't a clean eater. "Good thing I learned a bit of survival and tracking during school." April giggled as she followed the trail, she had to climb down and back up the roofs in order to stay on the trail, sometimes the trail would cut off and stop but she managed. She eventually was led to an alley that was pretty empty, the chip crumbs had ended at a manhole cover where she stood with an somewhat ugly look on her face. "Ew, sewers? Who would live in the sewers?" She questioned herself.

Leo knew someone was following them and was already waiting below, hiding up on top of the large sewer pipes and staying within the shadows near the cover. He had his brothers go back to the lair so he could double make sure his senses weren't lying to him, which seemed like they were not as the manhole cover was removed.

April had removed the cover which was pretty heavy and she knew she was also going to regret this. Her first night here has already been a little too exciting because of her curiosity, she crouched down and began to go down the ladder that was always provided with just about every manhole cover area around New York and there was always at least one or two lights in each tunnel of the sewers but it still was pretty dark in them and as far as she could tell just about half way down, it was pretty dark in this one. April let out a worried yelp as her hand had slipped off the ladder, causing her foot to get caught in between the bars and twisting her ankle which made her cry out a bit, she wasn't a big cry baby when it came to hurting herself or being hurt, she mostly was a big cry baby when it came towards others without really knowing it. So say if a very close friend or family member got hurt, she would start tearing up and crying without having any control over it, it has been an issue with her ever since she was a little girl. She had fallen to the ground butt first and grasped at her ankle whimpering to herself silently, "Stupid, Stupid…" She mumbled looking at her ankle, she knew it was pretty bad as it hurt badly to even move it, let alone she knew she would probably not be able to walk on it and was pretty much stuck here in a sewer tunnel of all places.

Leo instantly knew it was the same orange haired girl from back in the alley where he had stopped the muggers at, he glared at her as she had injured herself but didn't dare expose himself strictly from Splinters direct instructions not to. But he couldn't help and feel bad for her as she used the ladder for support to stand up, Leo moved back a little bit further into the darkness. April heard a small sound but couldn't quite make out what it was but she knew someone or something was nearby probably watching her failure of ladder climbing. April looked around the tunnel she was in as she leaned on the ladder and didn't hesitate to try and contact this person if they were nearby, "Hello!? Come on, I know you're there… er somewhere… Look I won't do anything stupid, not like I can anyway…" She yelled lowly hoping for something otherwise she would have to struggle her way back up the ladder, find her bag, and find her way to the apartment still along with abandoning this trail tracking of a ninja who is all about stealth, but again her curiosity got the best of her.

Leo let out a tiny sigh, April also did and was about to turn and walk up the ladder or attempt to. Leo jumped down from the pipe and landed in the sewer water not too far from where she was and the ladder, along with his swords being so close together gave a decently loud metal clunk. April jumped at the sudden loud sounds behind her, she hugged the ladder in sudden shock and let out a small yelp without knowing it and instantly turned and looked at the person who had jumped down from the pipes above her that she did not even bother looking up at. The only thing that came to mind instantly was a monster of some sort, standing right in front of her but she also knew it had no intention whatsoever to harm her otherwise it would have already or sooner. "Woah, you're a turtle monster!?" April said surprised and excited as her curiosity got to her again, she could tell it was a turtle mostly because of the shell plating on the chest area, and the green skin.

Leo looked at her and sighed, not hesitating to question and talk to her as she seemed to not be frightened by his appearance which honestly surprised him a bit. "Not a monster, a mutant." Leo said to her, "And why were you following?" He questioned. April looked at him directly in the eyes, his eyes were pretty blue and she adored them in some ways, she was also surprised he spoke English and knew. "You my friend are pretty decently easy to track." April said as she reached into her pocket pulling out a small chip and showing it to him. Leo widened his eyes at the sudden sight of the chip 'Mikey...You are so getting it when I get back!' Leo thought to himself angrily. Leo came to a sudden realization on what the girl had said as well, he looked back at her and raised an eye "Friend?" he asked confused. "You're the one who saved me and that other girl back there at the alley, no? And I can reassure you that I did see a glimpse of blue and white in those shadows." April said pointing at his mask and white hand and foot armors. "You realize bright colors can still be extinguished even in dark places. If that person has good eyesight though to be honest… Like me." April said smiling pointing back herself, bragging.

Leo looked at her angrily and sighed in anger, he turned away from her raising his hands up then back down "I can't right now, I'm off, It's bad enough I showed myself to you human." He said, too angered about Mikey's chip fest, about to walk off. "Hey now, I have a name you know, and it's not human! It's April! And are you seriously going to leave me here?!" She yelled at him angrily and kind of sadly, not wanting him to go. Leo stopped and turned his head, looking at her seriously. April looked down at the ground sadly "Thank you… for the save at the alley.." April said in a slight mumble. "Look I know you want to stay hidden, I won't tell anyone about tonight or you, who would believe me anyway…" She sighed looking back up at him. "The name's Leonardo." Leo said, turning around and walking up to her, pointing at her ankle. "I have someone who can help with that, but I cannot take you with me due to displaying location and direction of where I stay." Leo said. April understood this and it was hard for him, she knew he wanted to help her but felt bad that he had to a second time, she sighed and looked down ashamed but gasped at the sudden idea she got. April sat down and pulled her backpack off of her back that she still had, surprisingly enough the muggers didn't bother taking it off of her until it was probably her turn for that beat down. Leo tilted his head confused as April was scrounging and digging through her bag "Here we go!" She happily shouted, she had pulled out a scarf her parents packed for her as New York could get pretty cold during the nights. "You can tie this around my eyes so I will not see!" April said raising the scarf towards Leo who seemed shocked a little.

Leo glared at the scarf and back at her, "You're persistent…" Leo said, looking down at her. April waved the scarf around in front of him and insisted on wanting to come along, smirking. "Please?" She asked attempting to give a sad face to convince him, which seemed to be working. Leo twitched an eye and let out a sigh "Fine! Jeez, I'll be stuck carrying you too…" Leo said not amused at all of the situation. April only smiled and nodded, she didn't care of a giant three figured turtle touching her, she was no germ freak. In fact she was liking this situation and this encounter, it's not everyday you meet a mutant and actually get along with them, let alone them wanting to help you. Leo tied part of the scarf around her eyes to the point it was pitch black for her, he then lifted her easily in his arms and was also carrying her backpack for her. April was excited and she couldn't stop fidgeting in his arms and giggling happily a bit, she loved making friends and meeting new people along with interacting with them socially, even if it meant a giant talking turtle. Leo was unamused the whole way back to the lair where Donnie was to help April with her ankle, he knew he was so getting it with Splinter once he brang her there.