I didn't put any info last time so I will do it now. This fic is based on mermaid melody but will still be different from the original mermaid melody plot. And the full summary for this story is on AO3 (if you want to read it) and I will ask this: Will you guys be up for male lactation IF I put it in this fic? Hope you enjoy~!

Chapter 1: Beautiful Wish

Today was a big day for Eren. Today was his sixteenth birthday, which meant he could finally go to the surface world and live amongst the humans. He hoped he could see the human child he saved nine years ago, Levi was his name. Eren's first love.

In the merman world it wasn't particularly strange that two of the same gender were together. As long as you didn't have to continue the bloodline. In Eren's case, so was he the second born prince from his father's second marriage, and it was his older sister, the first born child from their father's first marriage, who will inherit the crown of their kingdom, Shiganshina.

Eren would be living with his uncle, Hannes, at a Bed & Breakfast Inn, helping out and go to school from there. Eren had longed for this day since he was young. Because now he could finally see Levi again. He hoped that Levi would recognize him. His sister, Mikasa, had assured him that it wouldn't happen because — no matter how much depressing thought that is to Eren — he hasn't changed that much since he was younger.

Mikasa just thought that Eren had gotten cuter and more beautiful since he was little. With his natural tan skin and lean body physique; not too muscular but not too skinny, and pink plump lips and his naturally wild chestnut colored hair. But his most beautiful feature was his big green-blue eyes with a hint of gold sometimes, it was like they never were the same color and changed all the time.

"Eren... do you have to go? Can't you just stay here?" Mikasa asked her little brother.

"Mika, you now how much I have waited for this day. I want to go to the surface world and try to live amongst the humans."

"Eren, what you want to do is meeting that 'Levi' again, right?"

Eren blushed at how his sister could always see right through him. But it was true, one of the biggest reasons why he wants to go to the surface was because he wants to meet Levi again. But Eren also wants to see how the humans on the surface world lives like. Thanks to meeting Levi all those years ago, he was now interested and curious about humans lifestyles.

"A-anyway I am gonna go now!" Eren said and started to swim to the surface with his penguin and best friend, Armin.

Armin was a hippocampus, but he had three forms, one his penguin form; he was yellow and wore a sailor uniform, the second one was his human form; Armin was a little shorter than Eren in that form, and he had big blue eyes and blond hair which was cut in a bowl like form, Armin's third form was his hippocampus form; which was like a big seahorse. He was also very intelligent.

"Are you sure about this, Eren?" Armin asked anxiously.

"Yes, yes I am sure Armin." Eren said with a finality in his voice. Armin gave him a light answer.

"Okay."

Eren had separated from Armin when they neared the surface. Armin swam to Hannes' place to inform the older man about their arrival. As Eren went to the place he last saw Levi. Luckily it was still early in the morning, so there wouldn't be many humans up at this time, so Eren could transform to his human form; the only difference about his human and merman form, was that his human form had legs. Otherwise he looked the same.

When he got to the stone, he heaved himself up, the sun would dry his fin. Eren watched the sunrise as he felt his fin change to human legs.

'It feels like that day, but this time I'm alone.'

Unbeknownst to Eren, so was a pair of blue calculating eyes watching him. As the unknown stranger stared at the beautiful merman bathed in sunlight, slowly transforming into a human. And mused as they walked away:

'Is this the merman "he" was talking about.'

Eren saw his legs, fully human like, and took the bag that Hannes had hidden his clothes in before his (Eren's) arrival. He saw that Hannes had picked out white skinny jeans, and a green long sleeved shirt with some strings, and some underwear. Eren couldn't understand how humans can wear those — he preferred to go commando but he had promised Hannes that he wouldn't — but he relented and put them on before his jeans and shirt. And climbed down the stone.

Eren walked around the beach, enjoying the sea breeze ruffling his hair, feeling the sand between his toes and the salty seawater fill his nostrils, and huge waves splashing on the shore.

It was then he saw it. At first he could only differ something black amongst the waves, later he saw it was a person on a surfboard, a guy, wearing a surfers wetsuit, which was black and short sleeved and it ended before his knees, the shoulders were blue colored but only the upper part of the sleeves were blue. The guy was fit, really fit and tall and the wetsuit just signified it more. Eren could even see his muscles from here and he was standing on the beach! The guy's hair was black and drenched wet with saltwater and slicked back, but Eren could see that he had an undercut under those long hair.

'He kind of looks like Levi', he mused.

Eren hadn't realized it yet, but as soon as the wave the guy had rode on ceased, he had seen Eren on the beach. The guy thought he had seen the brunet boy before but couldn't put his finger on it. That was until the wind blew and took the brown bangs out of the boy's face. The surfer thought he was imaging things, when he saw two big orbs of of a blue-green color. He got a nostalgic feeling when he saw them but shook his head.

'It's impossible, he couldn't be "him", there's no way!'

But he was curious, he started for the beach on his board. Nearing the beach and the boy, the surfer got the feeling that the boy was "him" got stronger. When the fin almost touched the ground the surfer hopped in the water, it only was to his knees and he started to go to where the boy was. The surfer saw the boy still had his head in the clouds and hadn't sensed the surfer nearing him. When he was standing in front of the boy, he realized that the boy was at least ten centimeters shorter — he was 182 centimeters, thank you. The boy had a tan and smooth skin, hazelnut colored and soft looking hair. And eyes like "him".

"Oi."

Eren snapped out of his musings as soon as he heard that deep, smooth and velvety voice. As he turned his head at the direction of the voice — which was in front of him — his eyes met a chiseled chest, ripped with muscles. He blushed at the close proximity and instinctively took a step backwards. He saw the surfer's face and held his breath, the surfer was on the border of being a man, Eren concluded that the surfer was between eighteen and twenty, he had a strong jaw, a small nose, raven hair, sharp features, thin eyebrows, and hooded silver-blue eyes. One thought ran through Eren's head when he saw those silver-blue eyes and a special face.

'Levi.'

"Eren!" A familiar voice rang through the thick tension and Eren turned around, his face lighting up at the familiar face of his uncle.

Hannes held his arms open as he ran to Eren, who in return also ran for his uncle and leaped in the familiar embrace of his uncle's arms around him.

"Eren! My boy, what you have grown! The last time I saw you, you were so small that you only reached my waist!"

"Hahaha! Uncle Hannes! That was when I was seven-year-old! It was nine years ago!" Eren laughed and gave his uncle a big smile. It was then Hannes saw the other person on the beach, a familiar face for the old man.

"Levi! Long time no see mate! How is the surfing going? Has there been any good waves lately?" Hannes asked and felt his nephew stiffen in his arms as soon as he mentioned Levi's name, but thought that he would ask Eren later about it.

"Long time now see, Hannes-san", Levi answered. He was a little annoyed that "Eren" had dissed him, but when he saw that smiling face, Levi decided that he didn't care.

"The surfing is going fine and the waves have been too calm lately, but today they were much better. By the way, who's that?"

Hannes smiled when he got to introduce his young nephew.

"Levi, this is Eren, my brother's youngest child, in other words my nephew. Eren this is Levi Ackerman, a surfer I have known for a long time."

Eren took a peek at Levi from his uncle's arms and gave a shy, "Hi, I'm Eren Jeager", to Levi, before he buried his face in his uncle's chest again. Both Levi and Hannes thought it was cute how shy he was.

"Sorry, Eren is shy around people he doesn't know", Hannes apologized to Levi.

"Ah, I don't mind, or rather I can understand that he is like that. But... I didn't know that you had a brother or a nephew", Levi drawled as he eyed Eren, who was slightly peeking at him again, eyes filled with curiosity.

"I have a niece too, she is Eren's older sister, her name is Mikasa. And I don't really think I have had the chance to tell you yet", Hannes explained.

"I see", Levi answered, letting the new information sink in. He was sure that Hannes was a human, because when he touches water he doesn't get a fin like a merman. But he wasn't so sure about Eren.

Levi still had his doubts that Eren was "him" but the probability was too high, they looked too much alike, the only difference was that Eren was older but it had been nine years. Surely "he" was as old as Eren and that would mean that they would look the same, like doppelgängers. But that probability was more unlikely than that they are the same person.

"Hey, Jeager", Levi started, looking straight into Eren's eyes. Eren answered shyly:

"Yes?"

"Where are you from?"

"I-I am from an island in the Shiganshina ocean, but my father's ancestors were German, and my mother is Turkish, which is why I'm naturally tan."

Was Eren's flawless answer because it was partially true. His mother came from a merman kingdom in Turkey, and his father's family's ancestors were immigrants from a German kingdom. They had built the Shiganshina kingdom from scratch and it had flourished to one of the most treasured kingdoms of the merpeople. And it was built deep under an island. So deep that humans couldn't or wouldn't find it. Only other merpeople could find it, it was a really safely situated kingdom.

Levi didn't detect any lie in Eren's answer. But he knew Eren hid something. And he would figure it out. He nodded at Eren's words, before he saw a familiar strawberry blonde walk towards them.

"Levi!" The girl greeted and ran to hug him. Levi hugged her back and gave her a peck on the lips, for a brief moment he thought that Eren looked hurt but hid too quickly in his uncle's arms again for Levi to know. Levi greeted his girlfriend.

"Hey Petra. Why are you up so early in the morning?"

"I knew that you would be here early today, so I made you some breakfast", she smiled and took out a small basket filled with different sorts of sandwiches. It was later she noticed Hannes and the boy in his arms.

"Good morning Hannes-san!"

"Good morning to you too Petra", Hannes greeted and noticed her curiously stare at Eren.

"This cutie here in my arms is my nephew, Eren Jeager. He lived on a island before, where everyone knew each other, so he is a little shy around strangers. He arrived today to move in with me, because he will start going to your school, Survey Corps right? He is going to be sixteen this year so he is going to start on his freshman year."

Eren mumbled something in his uncle's shirt, something like he was sixteen and not fifteen. It was then Hannes remembered what day it was.

"Oh! How could I forget?! I'm sorry Eren... I was looking so forward for your arrival that I forgot what day it was... And it is the 30th March..." Hannes said, his voice full of remorse.

"It is okay Uncle Hannes", Eren tried to soothe his uncle and smiled as he looked up at his uncle's face, "As a present you can listen to me singing, that will be enough."

Levi and Petra looked curiously at the scene, wondering what Hannes had forgotten. And what was so special about the 30th March. And wondering what it had to do with Eren and a present. Until Levi put two and two together as Hannes' face lit up as he seemed to get an idea.

"I know! I will take you to the city and there you can choose an outfit you want!"

Eren made a noise, sounding like a whine, both Petra and Levi thought it was cute.

"But Uncle! You know I don't know anything about this fashion thing. And why do I have to wear undergarments? It is much more easier to move without them!" Eren whined.

Petra almost choked on her spit at Eren's honesty and almost to no modesty to the public about his preferences. Levi on the other hand had to stiffen the smile that threatened to appear. He thought it was funny how Eren could be so shy around strangers but when he was with someone he knew, all that shyness would fly out the window. And didn't care about what he said out in public. Much like Levi himself.

Hannes looked embarrassed as he had to — again — explain to his nephew, why people had to wear undergarments in front of Levi and Petra. Eren, who didn't seem embarrassed or ashamed at all, was glad for the distraction. He didn't have to mull about Levi and Petra's relationship. But his chest really hurt, he wants to cry but have to stay strong. He doesn't want Hannes to worry, he already has too much work with the inn and doesn't want to cause unnecessary worrying. And he doesn't want to ruin Levi's relationship with Petra. As long as Levi is happy Eren will support him from the shadows. He will put Levi's happiness before his.

"Eren? Are you listening to me?"

"Yes, I am Uncle Hannes. But can we go home now? I'm tired from my travel."

"Of course Eren", Hannes complied easily, knowing that there was something Eren was hiding but let it be. For now.

Levi's ears perked up at that and was going to offer to walk them back because he wanted some of Hannes' cooking and try to make Eren comfortable around him and congratulate the boy on his birthday. But remembered that Petra had brought him sandwiches. He watched as Eren and Hannes bid farewell to them and walked to the inn, Hannes' arm was around Eren's shoulders. They were talking and Eren seems to enjoy it. He was smiling a big smile at his uncle, but Levi could see that his eyes were tired and... sad? But the smile was genuine and he hoped that someday Eren would smile like that to him. Levi continued to watch them walk farther and farther away. Hoping that Eren — for some reason — would glance back at him. Eren never did it as he disappeared from Levi's sight, and he felt his chest hurt. And touched the small container that he had around his neck, which was attached to a silver chain and contained a precious thing he got long ago from a friend and savior.

Hannes and Eren arrived at the inn, Wall Maria. Armin had went back to the kingdom to take care of some things, so he wasn't there. Hannes asked if Eren was hungry and if he should make something, Eren politely declined, saying that he was too tired and didn't have any appetite, so he would go to his room and rest.

As soon as the door was shut and locked, Eren's legs went weak, he managed to drag himself to his bed and buried his face in a pillow, as he finally let out a weak sob. The tears were flowing freely from his eyes as he tried to control the sobs. Eren felt his heart smashing in tiny pieces as he remembered Levi pecking Petra on her lips in his embrace. He thought that only this time he will let his feelings pour out. Later he will lock away these feelings he has for Levi. And wish for his happiness.

Eren touched the part of his chest where he could feel the outlinings of the heirloom that his father gave him. It was an old key that his father had inherited from the previous king, Eren's grandfather. The key was inherited in the Jeager family from father to son. That's why Eren treasures and treats it gently since he inherited it from his father, king Grisha Jeager. The only present he has gotten from his father, who always was so busy with the kingdom and training Mikasa so he never had so much time for Eren. But it didn't mean that Grisha never cared for Eren. In truth, Grisha was very protective over his youngest son, because Eren was too hotheaded but also too kind and naïve. Grisha honestly wanted to spend more time with his son and thought that he could as soon as Eren's birthday came, but was disappointed when Eren said that he will depart to the surface world on his sixteenth birthday. Grisha had sulked for days until Eren came to cheer him up, singing and dancing with his father and they had laughed a lot then.

Eren chuckled lightly through his sobs at the memory of his father. He had kind of calmed down as he touched the key. He turned his head to look at the clock, surprised that it was evening now. A light knock resounded through the room, Eren stood up and unlocked the door, on the other side of the door was an uneasy Hannes.

He had come earlier to Eren's door, as he stood outside the door he had heard Eren's sobs and had tried to open the door to rush to his nephew's side and comfort him, but unfortunately for Hannes so was the door locked and he couldn't get in. Hearing the crying of his nephew tore at his heart. Eren hadn't even been here for a whole day and in that short span of time something had hurt him, and Hannes didn't even know what. And like Eren's father, Hannes' older brother, so had Hannes too developed a protectiveness for his innocent and naïve nephew.

A sigh of relief escaped Hannes as he finally saw Eren opening the door. Soon a slightly paler Eren appeared. His eyes were puffy and red from crying so much and his nose was red and stuffy. Hannes asked if Eren wanted to eat something but the food was declined once again. Instead the older man asked if he could enter Eren's room. Eren smiled at his uncle and let him in.

The older man stepped in and went and sat on the bed. Eren also went to the bed, but he lied down, his head in his uncle's lap and face buried in the hard stomach, which smelled of the sea and food. The muddled feelings from before had calmed down considerably now, and Eren thought that he really is a crybaby as his mother and sister once told him. Large hands had started to stroke his hair as a deep voice hummed a lullaby to him. The same lullaby that his mother and father would hum to calm him down.

"Do you want to talk about it?" Hannes asked quietly, nearly a whisper.

A nod answered his question. Eren knows that he can't pretend nothing happened, Hannes deserved an explanation. He talked about his first meeting with Levi and what had happened that day, and that's why Eren wants to live and go to a school on the surface world. Hannes was also told that Levi is or was Eren's first love. That's why he had been so hurt when he saw Petra and Levi together today, Eren also told Hannes that he would, no will forget these feelings of his and continue with his life. Even if he never can find someone else to love for eternity, so will he forget this love for Levi he has.

Hannes looked sad after he heard his nephew's explanation. He hadn't known that Eren was the one who saved Levi all those years ago. Hannes knew that if he told someone in Eren's family they would most likely come here and take Eren back to Shiganshina, which will make Eren even more sad. The uncle of the merman boy decided that he wouldn't tell them yet, he would wait and see what happens first before he acts on something. With this resolution in mind, Hannes hugged his nephew, who started crying again against his stomach.

After crying for another good hour — and Hannes changing shirts because the one he had earlier was full of tears and snot — Eren said that he wants to go out to take a breath, Hannes allowed him to do so but not before he gave Eren a green cellphone to put in his pocket. He had explained to Eren how to unlock it and use it, he also showed his nephew how to call him, Hannes had put his number on speed dial on Eren's phone.

The sun was sinking lower when Eren sat on the beach drawing his knees up and leaning his arms on them, and saw the sky dye in red and orange colors. The sand was still warm from the day, so Eren wasn't cold. He heard footsteps behind him but he didn't turn his head.

Levi had seen Eren sitting on the beach alone and decided to befriend the Caribbean eyed boy. Which was unnatural for him. Levi doesn't like people much and is deemed as a clean freak, which is true. So he didn't know why he wanted to befriend Eren. Or he did know. He wanted to see if Eren was "him" or not.

The footsteps of Levi stopped behind Eren, as the taller of the two looked down on the brunet. He greeted Eren but was only met with silence. He tried again and this time Eren abruptly stood up and started to walk away. Unfortunately so had the raven fast reflexes and caught the boy's right wrist. Not expecting it, Levi had used too much strength, which forced Eren to turn.

Silver-blue eyes widened as they saw fresh tears running down tan cheeks and more tears around sad and glazed Caribbean eyes. Eren trashed around, trying to get away from the stronger male, but was too weak for Levi who regularly worked out.

"Lassen Sie mich los!" (Let me go!) Eren shouted at Levi in his mother tongue and glared fiercely at the taller male through his tears.

Levi was stunned that Eren could produce a glare like that — and suddenly speak German to him — and stupidly released him. He thought that Eren was too innocent and naïve and shy to get angry like that. But now did he know that he was totally wrong to think that Eren was weak and couldn't stand up for himself. What Levi didn't know was why Eren was crying and why it saddened him so.

Levi watched as Eren turned around and saw that Eren had dropped something. He saw Eren run farther and farther away, away from Levi, away from the sandy beach, till he reached the more rockier part of the beach, where the water was deeper so he could just dive in the sea.

The young merman dived head-first into the sea, as his body transformed from a human to a merman. His legs growing green scales that soon developed to a fin. His clothes magically disappeared, or rather they were transferred to the light green sea shell locket that Eren had attached to his left wrist. The merman swam and swam until he reached the destination where he knew that there wouldn't be any humans to hear him. Swimming to the surface, Eren saw an appropriate stone where he could sit on and still have his fin touching the water. He heaved himself up on the rock and saw the beautiful colors of the sky.

Eren had been shocked when it had been Levi standing beside him. The reason why he came out to the beach was to calm down and not to meet the reason of his emotional uproar. Hoping that Levi would leave him alone, Eren had opted to ignore the other, but when Levi hadn't left Eren knew that he had to get away, or else he would surely do something he regretted. He could feel the burning sensation behind his eyelids again and stood abruptly up to leave. But having his right wrist caught had brought up some unpleasant memories, so he had started to throw a fit and getting away from Levi as he unconsciously started to glare at him. That seemed to have been the trick as Levi loosened his grip on Eren's wrist and Eren had started to run away. Now that Eren was calm he wondered why he had thrown that fit, it could only be because of those muddled feelings Eren had been having.

Levi had been walking on the beach since Eren had run away from him. Heading to the place where he knew that his friend had been hiding at when he had saved Levi. Levi wondered what had made Eren so hostile to him, hoping that the younger male didn't hate him he continued his journey.

'One morning I woke up hearing my name..'

The scale Levi carried with him started to shine as he heard something akin to a song. Hurriedly he started to walk faster, not believing what he was hearing and hoped that it was what he hoped it was.

'My name, in someone else's voice

Floating above the deep blue sea

Below the blue sky I sing, a song about my dream

Somewhere in this wide sea, somebodies voice

Sounds so sad and heart broken..'

The voice was clearer now and the grip on the small container that contained the green shining scale got harder, the singer was male that much Levi knew and the voice was soft and smooth and gave Levi the same familiar feelings like he had gotten ten years ago. Levi broke out into a run, he ran faster than he ever had, until he saw a figure bathe in the setting sun's light. Harsh pants broke out of his mouth as he eyed the person singing on the rock. The contours clearly showed a fin. Levi listened to the song as he neared the person on the rock.

'From a lonely crying heart, love itself cannot be born

The only thing you get is overflowing sadness'

Now Levi was so near that he could see the chestnut brown hair. The sneakers Levi had put on was now met with water, he didn't care that they got drenched as all he saw was him. Levi stepped into the ocean, not caring that he was still wearing clothes, all that mattered now was the male singing that song.

'From the fragments of a beautiful wish of the deep blue sea

Someone's crying out for help, help from only me

In the big, wide orange sea the voice echos into my mind

while the orange sea blends into the sunrise'

Eren finished the song and stared at sunset, loving how the rays warmed him up, both physically and emotionally. His inner turmoil had settled down now. As he was going to hop into water again and swim back to Wall Maria and apologize to Hannes for making him anxious. A splash and then one more neared Eren and he tensed up. He quickly leaped into the ocean and his behind the rock.

'Why is someone here?! Did he see me?! No one should be coming here! This place should be way out from the places that the humans can move! It is also hid behind a cliff, so it should be hard to find!'

Before Eren started to swim a voice shouted for him to stop. A voice he recognized, Eren's eyes widened as he heard the owner of the voice neared the rock he hid behind.

"Please! Wait! You are the one who saved me all those years ago, right? You are the merman boy who sung with me, right?" Levi asked, desperate for an answer from the merman.

A green fin showed itself from behind the rock, Levi saw that it was the same green as the scale he had, relief made its way into his heart as he saw that familiar color. Now he knew that this was the merman that had saved him. But he also wanted to see the beautiful merman boy from his childhood. He begged for the merman to show himself but was met with a splash, Levi concluded that the merman had dived into the sea again.

'Is there a reason why he doesn't want me to see him?' Levi thought disappointedly as he turned around to swim back to the shore. He felt something tug at his leg and dragged him down under the water. Green-blue orbs filled his vision briefly before a hand covered his eyes, and felt something soft touch his right cheek, the last thing he saw was the merman's smile, he couldn't see the face because of the hand that covered over his eyes. Then he was pushed away and the merman swam away. Levi reached his hand out, in a futile attempt to keep the merman to remain.

Levi relaxed his body as he floated to the surface. Silver-blue closed until they could feel the sea breeze against them. Levi stared at the red-orange sky, reaching to touch his right cheek with his hand. Surely it had been lips that had touched him there. The merman had pecked him on his cheek. But… if the merman had wanted to kiss him he could have done it but didn't for some reason. Like he knew that Levi is in a relationship… But was the peck a friendly gesture or did it mean something… more?

"Aaah… this is so confusing", Levi mumbled to himself as he turned around and swam to the shore. Cringing as he felt his clothes clinging to his skin and hurried home before he catched a cold. It was still only March.