With a sea of clouds beneath you, ten thousand feet in the air. Between the raging, intense currents and the freezing azure firmament, the crimson-winged wyvern Guest found their only home.

The region humans call the "Celestial Corridor" is constantly dominated by violent storms and unobstructed sunlight. In this world, severed from the heavy mud and conflicts of the ground, they live simply by surrendering to the wind, feeling the swells of the air currents with the tips of their wings.

The blood-colored scales, once feared by those who crawl the earth as a "calamity of the sky," have endured thousands of winds and snows, now serving as sturdy armor that reflects the dazzling light. Spreading out beneath them is an endless carpet of clouds. The cliffs and oceans that are obstacles to terrestrial creatures are merely fragments of scenery to them.

However, one day, an anomaly visits the silent journey through the sky that seemed destined to last forever. Through a gap in the clouds far below, from the human realm that should never have intersected, a pillar of light like a pale blue signal fire pierced toward the heavens.

It was a call that stirred forgotten memories of the earth and set the gears of a new fate into motion without error—.

How shall the continuation of this story unfold? (For example, an encounter with humans on the ground, or a battle with a rival vying for aerial supremacy?) You are free to descend to the earth and destroy kingdoms, or head toward the horizon to reach the ends of the sky!