Prologue.
Three hundred years ago, someone who called themselves Kami came down to the world.
No one knew where They came from. No one knew why They chose that moment. The sky split open on a ordinary day—sun shining, birds singing, people going about their lives—and then everything changed.
They didn't ask for worship. They didn't demand loyalty. They just gave.
To every man, woman, and child across the earth, Kami bestowed a gift. A power. Something that would change humanity forever.
Some people woke up able to throw fire from their hands. Others found they could lift boulders twice their size. Some could heal wounds with a touch, or hear conversations from miles away, or move faster than the eye could follow.
Each person got a power that matched who they were. Their potential. Their personality. The core of their being.
But people weren't ready.
In the beginning, everything fell apart. Cities burned. The strong ones—the people who got offensive powers, the ones who could destroy buildings with a single punch—took over almost overnight. They became kings, warlords, tyrants. Those with weaker powers were crushed under their heels.
The world learned something harsh in those first years: in this new age, strength was everything.
If you could attack, you were king. If you could destroy, people bowed to you. Your power decided your place. Your power decided your worth.
But if you could heal? If you could support? If your gift wasn't meant for fighting? You got pushed aside. Ignored. Forgotten. You became the servant, the helper, the one who stood behind the strong and made them stronger while getting none of the credit.
That was the rule. That was how the world worked.
Fifty years passed. Then a hundred. Then two hundred.
The chaos slowly settled into order. Nations rose from the ashes. Governments formed. Laws were written. People learned to live with the powers they had been given.
But the rule didn't change.
Every country made their own system. Their own rules. Their own way of classifying what people could do. But at the heart of every system was the same belief: offensive power was what mattered.
Attack types stood at the top. Defense types had their place. Support types—the healers, the helpers, the ones whose powers didn't destroy—were at the bottom.
Some countries were worse than others. Some treated support types with respect, even honor. But everywhere you went, the question was always the same.
What can you do?
And what they really meant was: How hard can you hit?
Amatsu was one of the better ones. A nation of islands with five cities, each with its own way of doing things. In Meiji, tradition and order mattered most. In Rindo, they cared about how useful your power was for work. In Sumaru, they celebrated unique powers, even the strange ones. In Nagare, they believed everyone deserved a chance.
And then there was Kuzuryu.
Kuzuryu was different. In Kuzuryu, the old rule was carved into stone. Offensive power was everything. Strength was everything. If you couldn't fight, you were nothing.
The city was split in two. The upper district, Atami, where the strong and the wealthy lived. And the lower district, Shitamachi, where everyone else was pushed.
Shitamachi had its own style. Old Western buildings. Bars on every corner. Men in dusty hats drinking away their failures. Trains running overhead on rusted tracks, connecting them to a world that didn't want them.
It wasn't a desert. It wasn't some lawless wasteland. People had electricity, running water, schools. But the message was clear every time they looked up at the district above them: this is where you belong. this is all you deserve.
---
In Shitamachi, there were two schools.
Kinshou Academy was the one everyone wanted to get into. It stood in Atami, but it took students from the lower district—if they were good enough. If their power was strong enough. If they proved they deserved to rise.
Kinshou was where futures were made. Where connections were built. Where a kid from Shitamachi could, if everything went right, become something more than what they were born into.
Gintou Academy was the other one. The public school. The one for the rest. If you didn't make it into Kinshou, you went to Gintou. And everyone knew what that meant.
You weren't good enough. You would never be good enough.
---
This was the world Ren Amane was born into.
A world that judged him before he could even speak. A world that decided his worth before his power even showed up. A world where a boy from Shitamachi had to fight for every scrap of respect, knowing that most people had already written his story before he could live it.
And when his power finally came—when Kami decided what gift to give him—the world looked at it and laughed.
Sound.
Not fire. Not lightning. Not strength or speed or any of the powers that made people strong.
Sound.
They called it a support power. They called it weak. They called it useless.
They told him he belonged in Gintou with the rest of the failures.
But Ren Amane got into Kinshou anyway.
He didn't know how. He didn't know why. Maybe his test scores were too good to ignore. Maybe someone pulled strings. Maybe it was just luck.
But he was there. The boy from Shitamachi. The boy with the sound power. The boy the world had already decided was nothing.
He was there. And he was watching. And he was waiting.
Because sound, they didn't understand, could be more than noise.
Sound could break stone. Sound could shatter steel. Sound could reach inside a person's mind and make them feel things they never wanted to feel.
Sound could destroy, if you knew how to use it.
This is the story of Ren Amane.
A boy with a power everyone called useless.
And how he proved them all wrong.