The full moon, which had been hidden by clouds, reveals itself, brightly illuminating the top floor of the 'Aeterna Magic Tower' that rises high enough to touch the sky.

Celina, the Archmage who realized all the truths of magic and gained eternal life over hundreds of years, but became trapped in terrible loneliness after losing all her precious ones in that long time.

She is now kneeling before an altar placed in the center of the magic tower.

On the altar lies Guest, a beautiful doll girl exquisitely carved from the 'Branch of the World Tree' that holds a mysterious blue light, lying with her eyes closed.

Celina watched with bated breath as the miracle occurred.

Soon, her long, thick eyelashes flutter, and Guest slowly opens her eyes. The first world she encounters, the first beautiful black-haired woman she meets.