Kingdom Hearts: IV Somnus

"In twilight's embrace and dawn's tender sight,
Two hearts are adrift, obscured from their light.
Seek the true warmth where hope ignites,
And together you'll find the Door to the Light."

Sora awakens in the mysterious world of Quadratum, a place where nothing makes sense and escape seems impossible. His only chance to return home lies in finding Yozora, the man tasked with saving him. But as Sora navigates this strange new reality, he uncovers a dark influence lurking in the shadows-the Master of Masters, whose manipulations threaten to twist Sora's path and control his destiny. With every step, Sora must confront both the dangers of this world and the growing power of the Master, all while racing against time to save himself and the future he once knew.

This is a fantasy based on reality.

KH4 Fic, canon-compliant.