Hakuno finds himself in a strange world with no recollection of his past. It appears to be a school, but things appear to be off. A countdown begins. His friend stabs in him in the back and leaves him for dead. He wakes sometime later and is pursued by a dark avatar.
He stumbles across an ornate theatre where he finds a sword. When he touches the sword, a heroic spirit appears and makes a pack with him. She defeats the avatar and together they progress to the next level.
In July 1988, Tokyo was destroyed in a massive explosion. Thirty-one years later, Neo-Tokyo has emerged from the ashes. Following the massive redevelopment, projects work is starting to dry up, leaving the people struggling to make ends meet. Crime is out of control. Biker gangs fight for turf, destroying anything and anyone that gets in their way.
When Tetsuo comes into contact with a psychic who recently escaped from a secret government laboratory, abilities he never knew existed awaken. The government captures Tetsuo and confines him to the research facility, scared that he possesses the same potential as Akira, the source of the original explosion.
Tatsumi travels to the capital, determined to join the Imperial Guard and earn enough money to save his village from starving. Once there he realises it’s not the shining beacon of hope he’d believed it would be.
When the kind family that has taken him in are attacked by Night Raid, a shadowy group of assassins, he jumps in to save them, only to discover just how messed up the capital is. Turns out the rich family like to take in lost country folk and torture them to death.
Giant alien creatures known as Savages have been attacking the Earth for decades, but Humanity isn’t about to give up. Using Hundreds, a mysterious device that bonds with the host to give them control over super-powered weaponry is their only hope.
Hayato arrives at the floating military city/training academy called Little Garden with the highest ever Hundred compatibility. This makes the quiet and considered individual an instant celebrity. Unfortunately, it also ends up forcing him to duel with the academy president and most powerful slayer, Claire Harvey.