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Oshi no Ko: Regret Rewritten

RitvikMaliya
14
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Synopsis
After Aqua Hoshino exposes Hikaru Kamiki and fulfills his revenge, he dies—alone, empty, and full of regret. But death isn't the end. In the realm between life and eternity, Aqua meets Tsukuyomi, the goddess of regret, who offers him a single chance to return to the day of his final choice—with all his memories intact. This time, he must choose not vengeance, but love. This time, he must choose who he lives for. Ruby, Kana, Akane... or no one at all. In this rewritten timeline, Aqua walks a new path. One that will either redeem him—or destroy everything again. Disclaimer: This is an unofficial, non-commercial fanfiction based on the manga Oshi no Ko by Aka Akasaka and Mengo Yokoyari. All characters, names, and story elements from the original work belong to their respective creators and publishers. This work is created purely out of admiration for the original story and for entertainment purposes only.
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Chapter 1 - Regret Under the Moon

Cold.

That was all Aqua felt in his final moment.

The sea had gone silent. The blood from his wound thinned into saltwater. Hikaru Kamiki was dead—pulled beneath the waves, his final breath stolen not by Aqua's hand, but by the weight of every soul he had crushed.

"I protected her... finally…"

Ruby would be safe. She would live. She would shine.

But he—

"I'm sorry, Ruby…"

He thought of Ai. Of Sarina. Of Gorou. Of the promises broken.

And then... he let go.

Somewhere Else.

Not sea. Not sky.

A space between death and judgment.

Aqua's soul floated through a vast silver fog, his body no longer bound by pain or form.

"You burned your life for revenge," a voice whispered. "And now the flames are out."

He opened his eyes—not physically, but with the mind's eye.

She stood before him: a creepy-looking child dressed in flowing white, She has long white hair and brown eyes that are always wide open, causing her to give off a disturbing stare.

Still her eyes were old—older than lifetimes.

"Tsukuyomi," she said. "Goddess of the Moon. Keeper of Regret."

Aqua stared, frozen.

"You're real?" he asked.

"Only to those whose regrets still echo louder than death."

She reached out a hand.

"You did what you believed you had to do. But you died before your story could end. And so, I offer you this…"

A mirror of water appeared beside them.

Within it: the day before Aqua committed murder-suicide with Hikaru.

"You may return to this moment. With your memories. Your truth. Your pain."

She looked him in the eyes.

"But if you go back… you must not chase revenge again. You must choose a different ending."

"Choose someone to walk beside, or choose solitude. But choose."

Aqua stared at the reflection.

He saw Ruby—smiling, before everything shattered. He saw Kana, Akane…

And then he looked at Tsukuyomi.

"…Why me?" he whispered.

"Because even in death, your soul still begged for a second chance."

She held out her hand once more.

"Walk again, Aquamarine Hoshino. And this time… don't walk alone."

He reached out.

FLASH—

He gasped.

He was alive again.

Hikaru Kamiki was watching B-Komachi's final concert on his phone, just like before.

But this time, Aqua didn't move.

He didn't attack.

He turned around.

"I still have time," he whispered. "And this time… I'll live."

From this moment, the story splits into multiple character-based routes.

Each choice leads to a different emotional journey and ending.

Ruby Route – "The Promise We Never Made"

Kana Route – "The Girl Who Waited"

Akane Route – "Reflection of Genius"

Ai Legacy Route – "Smile Again"

Goddess Route – "The Moon Never Forgets"

Other routes may be added in the future