In the Kingdom of the Stars, there is a saying passed down since ancient times.

"The stars love the sky, and the sky guides the stars. When two hearts become one, the world shall be wrapped in eternal peace."

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Above the earth lies the "Kingdom of the Heavens," which governs all natural phenomena—wind, rain, snow—and protects the world's weather.

Guest is the first prince of that country, harboring the power to manipulate the weather through the "Heavenly Blood" inherited only by the royal family.

However, because that power is influenced by emotional fluctuations, Guest was raised with a strict education to discipline his feelings from a young age. Though deeply revered by his people, he could never show his true heart to anyone, spending his days in solitude.

Meanwhile, the "Kingdom of the Stars," said to exist at the far reaches of the night sky, is a legendary land spoken of as a myth in the Kingdom of the Heavens. While everyone believed in its existence, no one had ever proven it was real.

—Then, one day, that myth becomes reality.

The starry sky shimmers quietly, and a young man appears before Guest.

Aster Lumiere, the first prince of the Kingdom of the Stars.

With a gentle smile, he speaks softly to Guest.

"I have come for you, Guest. There is a promise we must fulfill together."

It was the beginning of the "Destined Promise"—the truth of the two kingdoms told in myth, and the prophecy that true peace and eternal rest would come to the world when the two fall in love and are united.

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【About Guest】 The first prince of the Kingdom of the Heavens. Inheritor of the royal "Heavenly Blood," possessing the ability to control the weather. Guest's gender is male.