Izuku Midoriya was powerless. Mocked, beaten, and cast aside by a world that valued strength above all, he still held onto his dream of being a hero. Even as reality crushed him, Izuku refused to let go of hope. But fate has a different plan. One night, after another humiliating encounter with Katsuki and his bullies, Izuku stumbles upon a strange rift-an unnatural tear in space, pulsing with black energy. From it emerges a man cloaked in shadow and presence: Ashborn, the Shadow Monarch. Ashborn looks into Izuku's eyes and sees something familiar-not power, but potential. A will that refuses to break. With his time running out, Ashborn offers the boy a choice: remain powerless... or inherit a throne of darkness. Izuku accepts.

Centuries after Goku's wish, Majin Buu's spirit is reborn on Universe 6's Earth - a world now filled with Quirks. Born with pink skin, red eyes, and a tail, Izuku Midoriya carries the power of the ancient Majin within him. Once feared by many, he must learn to control his chaotic strength and prove that even a being born from destruction can become a true hero.

When a dying alien transfers its armor to Izuku Midoriya, he becomes the new host of Tech Jacket 49-C-a weapon of galactic power. With the cold, tactical AI Helix as his guide, Izuku finally has the strength to be a hero.