Ai to Yuuki to Kashiwamochi/WMG
You should not be reading this page if you have not played the game, or at the very least read through the Darth Wiki entry.
It contains open discussion of spoilers, especially if you have only came here from the main entry without going to Darth Wiki first.
Ai-chan is Charlotte
At least in the bad ending. I mean, c'mon. Terminal illness, dreamlike world, all the sweets one ever could want, but not the one food she really wants... All the WMG about Charlotte having been a cancer patient... Maybe the good end is a timeline after Mado-kamisama removed the concept of witches from reality. I mean, dead people don't come back, but what if it is a world where that death did not happen?