The sun was slowly setting over Tokyo, painting the sky in golden and crimson hues. From the rooftop of her high school, Hikari Amaterasu watched the horizon, earbuds in, lost in thought.

— “Another totally ordinary day...” she sighed.

Bright but often distracted, Hikari was known for her obsession with astronomy. Since childhood, she had felt an odd connection to the sun. Each sunrise and sunset seemed to whisper something only she could hear.

That evening, while taking a shortcut through Shinjuku Park, a sudden flash of light burst from a bush. Curious, she cautiously stepped forward… and found a golden medallion, etched with an ancient solar symbol.

As her fingers touched it, a wave of warmth rushed through her. Visions flooded her mind: a palace of fire, warriors in armor, a gentle voice calling her name.

— “Awaken, Sailor Sun…”

She dropped to her knees, breathless.

The medallion still glowed. In the eerie silence, a luminous shape appeared before her — a feline-like creature with burning eyes.

— “I am Solis. And your destiny has just been set alight.”