An Oath to Return

"An Oath to Return" is the secret ending of Kingdom Hearts III Re Mind. Unlike previous secret endings in the series, there are two possible endings, with one being the "true ending", while the other is a "bad ending". The condition to unlock either ending depends on if Sora defeats Yozora in the Secret Episode of Kingdom Hearts III Re Mind.

True Ending
As Sora defeats Yozora, Yozora stumbles backwards and begins to fade away into light. He muses that his powers aren't needed yet, but when Sora is confused, Yozora simply tells him not to mind before fading away. A light then shines, engulfing all of Shibuya and sending Sora back into the Final World.

Yozora wakes up in a car to his driver, who calls him "Commander." The driver asks him if it is impressive, to which Yozora reflects silently. Sora's first line in the Kingdom Hearts series is repeated, with Sora, then Yozora, and finally both saying the line in unison. Sora then says that none of this is making any sense to him. Yozora's voice actor is credited, before the secret ending finishes with: "An Oath to Return: KINGDOM HEARTS."

Bad Ending
If Yozora defeats Sora, Sora stumbles backwards in shock. Yozora apologizes before telling Sora that he doesn't lose. Sora begins to transform into ice, with Yozora vowing, "I will save you." A bright line engulfs Shibuya and transports Yozora into the Final World.

Yozora wakes up in a car and muses wistfully. Sora's first line in the Kingdom Hearts series is repeated, with Yozora, then Sora, and finally both saying the line in unison. Yozora then says that none of this is making any sense to him.

Characters in order of appearance

 * Yozora's driver can be heard waking him up in the "True Ending".

Trivia

 * When Yozora wakes up in the "True Ending", it is a scene-by-scene recreation of the opening to the  2011 trailer. Kingdom Hearts series creator Tetsuya Nomura was originally the head director for Final Fantasy Versus XIII.