No one knows when, where, or how "the gate" was created; furthermore, no one can see, touch, or access it. However, when "the gate" is opened, realms of mortals, fairies, and daemons collide, destroying world orders. While leaders of three realms try to restore orders, some talented and capable mortals begin to approach the gate, now known as "Divine Gate." Yet no one has reached the Gate and returned, however.

When the Divine Gate opened, the living world, the heavens, and the underworld became connected, ushering an era of chaos where desires and conflict intersect. To restore order, the World Council is formed. As peace is restored, the Divine Gate becomes an urban legend.

In that world, boys and girls deemed fit by the World Council are gathered. They are ones who aim to reach the gate for their personal objectives. Those who reach the gate can remake the world.

What lies beyond the gate? When they reach the door, will the world change? Will it be the past that changes, or will it be the future?