In a fantasy world filled with magic and dangers, our protagonist, a young swordsman named Hiro, is born with a special ability. He possesses the unique skill to create an illusion that his sword is immensely big, even though in reality, he wields an average-sized sword.

Determined to become the world's greatest swordsman, Hiro sets out on a journey to hone his skills. Along the way, he encounters companions, each with their own abilities and objectives.