i promise that the ending

I've seen the 600+ post thread about people speculating how to get the "best" ending, and what affects it. i give my first love to you I've done a simple test, and contrary to what theories about playstyle, enemies killed, damage taken, etc, claim, the only thing that changes the Memory ending to Promise ending is time played! Maybe people spent so much time trying to kill everything, they simply timed out by accident