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hanabikuroi · 2 years

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Assassination Classroom - Over The Moon AU

I have watched "Over The Moon" on Netflix recently and have the amazing idea. What if we wrote an Over The Moon AU for Assassination Classroom?

Here is my concept of the Over the Moon AU. Please bear with my long ramblings.

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Thousand years ago, Koro became fatally ill due to an incurable disease. His beloved wife, Aguri, loved her husband very much and decided to find a way to heal her dying husband.

So she travelled far and wide to search the legendary Tree of Life, a magical tree that bears a legendary magic peach that only blooms and grows once in a thousand years, which could heal all diseases, no matter how incurable it is. After weeks of searching, she found the tree, and saw the magic peach, glowing with power. Desperate enough to heal her dying husband, she plucked the peach, went home, and made a healing elixir that could heal Koro.

She made Koro to drink the potion and feel the healing power of the elixir, so Koro will be healed. As expected, Koro had recovered from the disease and they lived happily.

But the happiness was short-lived. Aguri found the painful truth about the magical peach too late.

Shin (the Second Reaper), the young and talented village healer, told her the painful truth about the peach. The one who intakes the magic peach can be cured by any illness that plagues him or her, but there is a catch, a curse. The one who intakes the peach can't die, and will be immortal forever.

Aguri clung on her husband’s hands tightly, as she held on his fleeting embrace. He was floating upwards, a mysterious force pulling him away from Aguri's loving arms. The curse has started, and Koro was taken away from her. She cried and cried, holding Koro's hands tight, but she can't cling to him any longer. She let go him, her hands trying to reach her beloved, but Koro was now far away, floating to the glowing moon above.

Aguri was grief-stricken and feels regret over the loss of Koro, so every day and every night, she would offer mooncakes and sweets to an altar she made for her husband. She would pray and sing, so Koro could hear her voice, hoping that she would reunite with him soon.

Unfortunately, Aguri is a mortal and have a short lifespan. She never remarried, as she still loves Koro very much. The tried everything, she prayed and plead and she went to the Tree to find another peach to eat so she could be reunited with Koro, but the peach only grows once in a thousand years. She fell ill and died alone at a young age, without Koro in her embrace.

The now-immortal Koro was alone in the moon, trapped forever in rock and lunar dunes. He cried for the loss of Aguri, as his crystal tears fell to the ground, giving life to the rocks that became his faithful subjects. The rocks turned to humanoid teenagers, which will help him cope with the loneliness and longing for his beloved Aguri.

Every 13th day of the third month (March 13th), people celebrates the tale of Koro and Aguri by eating and offering mooncakes, while telling the children about their tragic tale. The moon would shine so bright at this time, forming a crescent shape as the reminder of Aguri's love for Koro.

Thousands of years after, there was a boy named Nagisa Shiota. He lived a happy childhood, his father would tell him stories, while little Nagisa and his mother, Hiromi, would listen to the tale under the moon. Their favorite story was the tale of Koro and Aguri. When Nagisa was 8, Nagisa's father gives him an old necktie with a crescent moon emblem and a golden moon pendant.

They were very happy, until Nagisa's father died due to illness, leaving his mother depressed and insane, as she started to think that Nagisa was his daughter she never had. She began to have delusions of a happy family, and became abusive to her son, punishing him if he never did her wishes.

Until the day they met the Asanos.

When Nagisa was 14, Hiromi met Gakuho Asano, a widower, and it was love at first sight. After a year, they are planning to get married, and Hiromi began to revert back to her old self, although she was a little abusive to Nagisa.

Gakuho has a son, Gakushuu. He is the same age as Nagisa, and he was very different from the meek Nagisa. He was always serious, competitive and kinda proud, and Nagisa had difficulty getting along with him.

Nagisa was tired of this life. He still wanted his father, and hated the fact that his mother easily replaced his father by Gakuho in her heart. So he wanted to meet Koro, the god of the moon, to prove to his mother that love is not replacable, and it is forever. He had a plan: to build a rocket to the moon.

With a little knowledge of Science and determination, he successfully made the rocket, but he never expected Gakushuu joining his plan to meet the moon god, let alone met Koro in personal. Nagisa lost control of the rocket due to shock, crashing it.

Nagisa was pissed when he found out Gakushuu joined him in this plan. Gakushuu argued that he silently help Nagisa solve the equations needed for the rocket, as some of the calculations Nagisa did are slightly wrong, and can cause trouble for Nagisa later on. Also, Gakushuu wanted to see if this Koro is real all along, as he was still skeptical about the story.

They were arguing when they were suddenly taken away by flying... Octopuses? Gakushuu loses his shit.

And do I have to tell you Koro was always holding concerts at his kingdom? Can you imagine that?

Gakushuu and Nagisa meets Koro, the god of the moon. Nagisa was ecstatic and took a photo with the moon god, while Gakushuu was still mumbing how this is possible. It was peaceful until Koro demanded about a gift to them. The two humans were confused about the immortal's demand. They don't know about the gift.

So Koro had stolen the picture of Nagisa and him as a ransom, as he announced to all his subjects that anyone who can find the gift before the last sliver of moonlight in the orb fades, their greatest wish will be granted. Of course, all of Koro's subjects were excited, so they rush out to find the gift. Nagisa wanted to get the picture so he ran outside, leaving Gakushuu looking at Koro with a glare, suddenly challenging the moon god, demanding about the picture. Koro agrees.

They settled the fight by doing a quiz bee. Two girls, a blonde named Rio, and a purple-haired girl named Ritsu, held the contest, while the Gakushuu and Koro were the contestants. They answered questions with precision, and even Koro was amazed of the strawberry-blond kid's intelligence. But they still continued on, Koro was starting to get annoyed by the kid's knowledge. Until the final question.

Koro mocks that a measly kid like Gakushuu can't answer the final question, as Koro was a thousand years older than Gakushuu and more knowledgeable. Gakushuu, having a sharp mouth than anyone, retorts and mocks the moon god about the past.

"You are more knowledgeable than me, you say to me... But why you never stopped Aguri from picking that magic peach, making and letting you drink that potion that made you who you are now? You're selfish, because if you are knowledgeable as you said you are, I think you know the peach can make you immortal! Aguri was fooled by you!"

Koro was aghast about the accusations and he was pissed, unable to concentrate, leaving Gakushuu to be the victor. Koro screamed angrily that Gakushuu and Nagisa would never get the picture until the gift was given to him, breaking the deal. He left the room with Rio and Ritsu (who was apologizing), locking Gakushuu inside.

Koro was in despair, his heart was desperate to find the gift. Okuda and Takebayashi, the royal chemists, were busily mixing potions that will be needed for the ritual. Irina, one of Koro's two trusted advisors, advised the moon god to calm down. Koro replied that he can't bear to calm down, as the time is nearly up, and he can't reunite with Aguri if the gift was not yet found. Irina assured that they will find it, that Koro will gonna reunite with Aguri. The moon god smiled gratefully at Irina as he looked at what the chemists do.

After a few moments, Okuda announced that the potion for the ritual was ready. The gift was the only one left needed. Koro sadly smiled as he looked at the orb.

Nagisa went with a team of bounty hunters, Terasaka, Muramatsu, Yoshida and Hazama. They fought and escaped the obstacles, as they reached the crash site, finding for the gift. Nagisa started to lose hope, praying for a sign. As he looked around, he noticed a sliver of pale light hitting the necktie. Nagisa widened his eyes as he realized that the necktie was the gift, and happily shows it to the bounty hunters. The bounty hounters, however, had interests for Koro to grant their wishes, bullies Nagisa into giving them the gift. Nagisa gives them a gift, but he was pushed by Terasaka, while his team laughed behind him. Suddenly, he was saved by a red-haired boy and a green-haired girl.

Terasaka calls the new arrivals outcasts as the redhead smiled like a demon, "You both were exiled by the great Koro-sama, why are you here?"

The redhead shrugged and threatened them in a conscending tone to give the necktie back to Nagisa, while the green-haired girl smiled menancingly, sending Terasaka's team shivers down their spine. Terasaka suddenly ran towards his bike with the necktie in his hands, and rode away, along with his team. Nagisa was shocked, before the redhead grabbed his hand and ran to a big pond where they could catch up with Terasaka. They reached the pond and rode on the huge toads's backs back to Kunugigaoka, as the toads like to feed in the lake near Kunugigaoka. Nagisa asked for their names.

"It's Karma and this is Kaede, by the way. You?"

"I’m Nagisa."

"Hi, Nagisa!"

Nagisa remembered what Terasaka said, and asked about it. Karma sighed as he reveals that Koro exiled him due to a song Karma sang to him about moving on. Before the exile, Karma was one of Koro's trusted students. Nagisa find out that Koro loved teaching, and Karma was one of the lucky Kunugigaokans who are the moon god's students.

Nagisa also found out the Kunugigaokans are born through Koro's magic tears. That means Karma practically came from the moon god's tears.

Kaede, on the other hand, was Aguri's actual younger sister. Nagisa was confused how she was with Koro when she was supposed to be mortal, while Aguri can't, Kaede revealed that she is actually a spirit, kinda like a shikigami, who died years after Koro was floated away to the moon, and her spirit remained to accompany Koro as his companion. Nagisa wondered why it was not Aguri, and Kaede explained that Aguri was the one who picked the peach, making it part of the curse Koro was suffering. The curse was not only to make Koro immortal, but it also affects Koro and Aguri's fate. They can't be together happily, even how many lifetimes they will be in. She was also exiled with Karma after telling Koro that a ritual to bring Aguri back would possibly not work.

Nagisa realized that Koro was unfair giving the two of them the punishment of exile for just saying a helpful comment. Nagisa spoke that he never expected Koro to be an arrogant and selfish prick, as his father told him before that Koro was graceful like a swan landing on a quiet lake, full of kindness and hope. Karma replied that Koro just missed Aguri, and love can make you desperate to do anything that may be impossible.

Nagisa smiled bitterly and agree. Kaede asked about Nagisa's family life and the bluenette told the entire life story. The two listened attentively to him. He even told them about his mother and Gakuho being remarried, and Gakushuu.

Karma smiled, "I hope I will experience having a sibling. Well, a sibling who could share my hobbies of pranking other people..."

Kayano nodded as she spoke with a cheerful voice, "Having a sibling is a fun experience though! Aguri was sweet, and she was a good sibling. Besides, we were alone for a thousand years, since we were exiled by Koro-niisan from the castle."

Karma smiled, "It is not bad to move on. You can remember them forever, cherish their memories, but you can't stay in the past and be stuck. Otherwise, you will feel alone forever."

Kaede had also remarked one fact about Koro.

"When he was overwhelmed by great emotions, the entire kingdom of Kunugigaoka will be affected, since he was the one who made the kingdom from scratch. In fact, when he was striken by great grief, Kunugigaoka will plagued by darkness, as Koro's happiness powers the entire kingdom's bright lights. The last time he was striken with great grief was the time he first landed on the moon, long before the kingdom of Kunugigaoka was made."

The trio catch up to the bounty hunters, after they reached the kingdom of Kunugigaoka, Nagisa seeing the orb on the castle glowing faintly, signalling they were running out of time. Terasaka and the gang tried to stop the trio from getting the tie, but the trio were persistent. They fought and fought, Kaede was jumping like a rabbit, Karma was happily punching Terasaka, with Nagisa watching at them in horror and shock, but in between their fight, the tie was accidentally destroyed. The bounty hunters stopped fighting them and proved that the tie was now useless.

Meanwhile, Gakushuu finds a way to escape the room and wanders around the place, looking for something to use for defending himself while looking for the photo. While finding, he met Isogai, a kindhearted Kunugigaokan who happily helped him find the photo. Along with Isogai is Maehara, a flirty blond haired Kunugigaokan.

Nagisa looked at the tattered tie in despair. "It was my father's gift to me, along with this pendant I am wearing."

Karma looked at the pendant and remarks that the pendant seems familiar. Nagisa looked at Karma in confusion, as Karma shrugged, thinking that he may be wrong. Nagisa looked at the pendant and saw something in it. The moon seems like it was actually part of something.

Kaede squinted at the golden pendant and commented, while smiling wistfully, "I remember that Aguri-neechan has that similar necklace thousands of years ago, a full moon necklace. Koro-niisan too have a similar pendant too, although it was a crescent moon pendant. He was still wearing it even now, after a thousand years. I remember that if you combined those two necklaces, it will become a whole moon, like a damn puzzle. It was their version of a wedding ring."

Karma laughed, "Yeah, I remembered that pendant. Koro-sensei showed it to me back when I was still his beloved student. He was so protective of it that he cried like a waterfall when I hid that pendant playfully that time. I remember that is how Itona-kun and Ritsu-chan was born."

Nagisa stood there, pondering over their tale. Being a perceptive person, all the pieces were put to place.

"Like a puzzle. The pendant is like a puzzle. The gift..."

Nagisa's blue eyes widened as he had realized that the tie was not the gift, but the pendant. The pendant that was with him all along!

Karma and Kaede smiled happily for Nagisa while Nagisa looks at the orb above the castle, there is only a sliver of moonlight left. Nagisa knew that there is little time left so he ran along, with Karma and Kaede following him.

While running inside, Gakushuu and Nagisa bumped to each other, and Nagisa hugged Gakushuu in happiness. Gakushuu was shocked as he tried to pull back (he kinda hates hugs), but Nagisa tightly gripped him.

Meanwhile, Maehara and Isogai looked at Kaede and Karma in apprehension, as all Kunugigaokans know that these two are exiled by Koro-sama due to personal reasons. Karma playfully greeted them while Kaede waved back.

Suddenly, a tall man came in, looking at the scene with a serious look. Everyone looked at him, even Nagisa who was pulling away from annoyed Gakushuu.

"Karasuma-sensei!" The four teens greeted the man, who was named Karasuma. Karasuma is Koro's second trusted adviser, along with Irina. Karasuma spoke in a serious voice, "I know you have the gift, the octopus is waiting for you in the main room."

Nagisa was confused why Koro, the god of the moon, was called octopus by Karasuma. Karma, remarked that Koro has great affinity with octopuses as Aguri loves octopuses. In fact, he was sometimes called "octoperv" by some people close to the moon god, due to his hidden pervert nature. It was a cute nickname for the immortal moon god.

Nagisa raised an eyebrow, he never knew about the fact that Koro was like some ordinary male, sometimes a perverted creep.

Koro was in the middle of the room, waiting for the gift, with the Kunugigaokans looking at the new arrivals with concern, happiness and relief. He raised his weird-looking eyebrow to Karma, who smiled like a demonic entity, and Kayano, who awkwardly waved at him. Kayano then looked at Koro with a concerned look, reminding him that it may not work and her opinion still stands, and the moon god smiled sadly, as he walked towards Nagisa.

Nagisa held the golden moon pendant to the immortal and Koro gently picked it up from the bluenette's hands. He looked at the pendant wistfully and removed his own crescent moon pendant from his neck and connected the two necklaces together. It fits like a puzzle piece. Takebayashi poured the potion over the necklaces and the necklaces glowed brightly.

"As two halves can be whole again, this necklace was now complete, like our love. Now, you can come back to me... Aguri."

The castle scenery changes, as it morphed into a clearing, with lots of trees around the place. There is a house in the middle, and Koro, in simple yukata he was wearing back when he was still mortal, was standing in front of the house. Nagisa, Gakushuu and the Kunugigaokans were looking from far away.

The door of the house opened, it revealed a short haired woman wearing a fancy yukata. She was short, with onyx eyes tinged with brown hues. Her short hair was adored with little hairclips and jewelry that was common for women in her time. Nagisa and the Kunugigaokans gasped from far away as they saw the woman. They saw the woman on the paintings of the castle, paintings where it was depicted Koro with his beloved wife. The woman was Aguri, the woman in the paintings and Koro's beloved wife.

It was a tearful reunion, with Koro looking at his love with a longing look as he spoke how he had missed her, and they were now reunited after a thousand years. Aguri smiled and held Koro's cheek with gentleness, but Aguri's hands glowed and slowly became transparent. Koro looked at Aguri in shock.

Aguri tearfully reveals that she can't stay any longer, as they can't be together, and Koro has to move on. Koro shook his head, screaming Aguri's name as he tried to hug Aguri and stop her from fading away, but the woman slowly floated away like how Koro had done a thousand years ago. Koro reached out desperately, trying to grab his beloved wife's hands, but Aguri faded away, smiling and saying, "I will always love you forever."

As Aguri faded away to the wind, the sliver of moonlight on the orb shatters, leaving into nothing. The time was up, and it was too late to bring Aguri back. She was gone forever.

Kaede looked at the scene sadly, as she saw her sister faded away to the wind, like how Koro has done before. She sadly remarked that she knew from the start that the ritual will never work in the first place. The curse will always plagued their fate. Also, if that was possible, you can't bring back the person long dead for a thousand years. Koro is an immortal, and Aguri isn't.

Upon hearing Kaede's sad truth, Koro was stricken with grief over the loss of Aguri once again, plunging Kunugigaoka into darkness. The god suddenly formed a protective barrier around him, forbidding anyone access to him. The Kunugigaokans were worried about their leader, Karasuma voicing his concerns.

"We can't enter the barrier, it is too powerful and no one can enters there. If there is someone that can enter it, they can't go out until Koro stopped the barrier. And knowing him, he will stay like that forever."

Irina continued, "He really loved Aguri very much, and did everything to make her come back. But we all know that it is impossible. Kayano-san was different from Aguri-san's case. That curse..."

Nagisa was confused, "How Aguri was different from Kayano?"

Karasuma looked at the moon good and sighed, " There is actually a story that was actually not included in the tales that you humans say about Koro and Aguri. When Aguri picked the magic peach and made a potion for Koro to drink, a powerful sorcerer named Shiro was very angry. He wanted the peach to himself, to be immortal forever. When he found out that the magic peach was gone, and hearing the news that a mere mortal became immortal after drinking a potion containing the peach, he was pissed. Of course, he can't curse Koro, as he was now immortal and now in the moon, so Shiro cursed the one who made the potion, the unfortunate Aguri. He used a forbidden spell to curse her."

Gakushuu asked, "Let me guess, the curse was not to let Aguri reunited with Koro forever??"

Irina nodded, "Yes. Aguri's spirit and Koro can't be reunited until the curse is broken. Shiro had announced that the curse should be broken before the last sliver of moonlight in the orb shatters, or Aguri be gone forever. But unfortunately, the curse was too powerful, even the gods can't easily lift it without trouble. Even Koro, who now revered as the god of the moon. But he tried everything to break the curse for a thousand years, and this is his chance to do it right. But he failed. That sliver of light was gone. Now Aguri is gone, and Koro can't bring her back forever."

Nagisa and the Kunugigaokans were worried when they heard the words. Even Gakushuu, who shows slight concern. Nagisa stepped forward and into the barrier's end, touching the barrier, expecting it to feel like a wall. They all were shocked when his hands passed through the barrier. Nagisa looked at the depressed god of the moon and determined to enter the barrier. Gakushuu stopped him, his hands touched the barrier. Unlike Nagisa, it never passed through.

"Are you crazy?! What if you will be stuck there forever? I can't go home without you, I still have a future on Earth!"

Nagisa sighed as he smiled, "The moon's guiding light will be gone if we don't do something."

He went inside, ignoring the pleas of Karma and Kaede telling him to stop. Nagisa walked towards Koro, who was curling up into a ball.

"Koro-sama? It's me, Nagisa. The effeminate boy? I want you to know the Kunugigaokans needed you..."

Nagisa went to reach Koro, but something... Or someone stopped him. It was the vision of his father. Nagisa widened his eyes in shock and sadness as he looked towards his father, reaching his hand to hold his father’s face once again. He cried, as he screamed for his father to come back. But like Aguri, the vision floated away, leaving Nagisa depressed. Nagisa curled up to a ball in sadness, as the memories of the happy times rushed over him.

Meanwhile, Gakushuu, Karma and Kaede tried hard to break the barrier, but it was no use. Gakushuu punched the barrier but it wouldn't budge. He may not admit it, but he is started to care about Nagisa. Kaede tearfully screamed as she pounded in the glass in desperation. In her desperation, she revealed a secret Gakushuu was shocked for: Nagisa was Kaede's descendant.

Kaede had apparently died in her 20s when she give birth to a baby boy, her first child. Before dying, she gave her sister's necklace to her son as a reminder of her sister's love for her husband. It became a family hairloom, and Nagisa got it from his father thousand of years later.

Karma comforted Kaede as Gakushuu looked towards the greenette and Nagisa in shock.

Meanwhile, Koro had noticed Nagisa crying towards the vision of his father before it fades away. Koro felt sadness as he looked towards the depressed bluenette, he realized that both he and Nagisa are similar. Both of them lost a loved one and grieving over their loss. He floated towards Nagisa and gently lifted the teen's head.

Nagisa looked at the moon god with a tearful gaze, as the moon god sadly smiled, speaking in a soft voice, "You don't belong here, Nagisa-kun. You have a family to come back to. Don't drown in sadness like I did, you are still young. I know it hurts to let go of them, but we had to move on and be happy with the ones we currently have. You will remember the moments with them, but we can make new ones. You have your mother who needed you, your new stepfather to support you, and a new brother to love you."

Nagisa looked down as he spoke in a soft voice, looking towards the moon god's dark eyes "It's not too late for you to move on too." Aguri may be gone, but they are still there." Nagisa pointed out to the teenagers who stood outside the barrier, "They needed you too."

Gakushuu punched the barrier, with Karma punching along with him. "Nagisa-kun, I know we are not in good terms, but we will try to work this out! Because we are now a family!" With one last punch, the barrier shattered, as Gakushuu and the Kunugigaokans rushed in to greet Koro and Nagisa.

Nagisa hugged Gakushuu tightly, as Gakushuu, still uncomfortable in hugging people, squirmed before giving up. Kaede smiled at Nagisa, while Karma patted his back.

All Kunugigaokans rushed towards the moon god, as they hugged the crying moon god. Ritsu, Okuda and Kurahashi was crying loudly, hugging Koro tightly. Karasuma and Irina stayed behind, but they were smiling at the joyful event.

Later on, Koro and the Kunugigaokans are ready to say goodbye to Nagisa and Gakushuu. Koro had apologized to Karma and Kaede for banishing them from the kingdom, as they were just trying to make him happy by moving on and focus on the ones who loved him now. Karma just laughed and said that it was fine, traveling was fun and exciting, that he gets to pick fights easily outside without Koro scolding him, making the moon god slapped Karma's head playfully. Kaede snorted as Karma hugged Nagisa and Gakushuu tightly as he admitted he was going to miss them, Kaede giving Nagisa a quick peck in the cheek. Nagisa blushed pink over the actions. Koro happily gives Nagisa the picture of Koro and Nagisa together, as proof. Nagisa clutched the photo with happiness, as Gakushuu rolled his eyes.

With the octopuses flying them away, Gakushuu and Nagisa returned to Earth. To a human observer on Earth, they are like shooting stars. Nagisa looked at the photo in his hand, and saw the photo is fading away. Nagisa realized that he didn't need proof, so he let the photo floated away in the wind as they fall towards the Earth.

Months after, Hiromi and Gakuho had married. Hiromi changed for the better, and Nagisa is happy that his mother is now happy in life. His brother, Gakushuu, started to warm up to him.

They celebrated the March 13th festival with their relatives by eating mooncakes and sweets while sharing stories of Koro and Aguri. Nagisa laughed at some of the story as he looked out at the moon. The moon was glowing bright, as if it was acknowledging Nagisa.

After the mooncake eating, Hiromi was with Nagisa, looking at the moon with a serene look in their faces. They remembered the memories of the past, but there is no heartbreak now. Hiromi apologized about how she acted towards Nagisa ever since his father died, and Nagisa smiled as he hugged his mother tightly. As they playfully chasing each other in the night sky, the moon shone brightly than ever, as a beautiful swan in a lake flew towards the moon.

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So what do you think about it? I tried hard to fit the Assassination Classroom elements to Over the Moon, add some twists and new ideas, and hoping that there is not a character that is too OOC.

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