Legend of the Millennium Dragon (2011)

Dragged into a shadowy realm of dragons, beasts, and forgotten magic, Jun—an awkward middle-schooler—finds himself the unlikely key to a war he never knew existed. Each impossible battle peels away his shyness, forcing him to confront a destiny written long before his birth. As monstrous forces close in, Jun must decide whether to run from the chaos or embrace the power sleeping inside him, becoming the guardian the fractured world desperately needs to restore its fragile peace.