To start with, a bad quality Image (I liked the history so i may make this again and better) and a short Tale:

"I had a wonderful dream!, a dream which started like a nightmare, everything was dark and the ground was stone, but then my hooves started to shine and i had a crown!
While i walked a golden road started, making the stone grass and the sky slightly blue!
In my way i saw a weird black fox with strange eyes, he said "May i know, snow white lamb, where you got such pretty items?", he was polite so i answered "I don't know sir fox, but you can come with me and figure it out"
In our way we found other two twin arctic foxes, they only looked at us but then one talked "You will get lost and never find your way back, you should leave" he pointed the opposite direction.
The other fox also talked and pointed the way we where taking with her tail "Follow your hear and if you, princess lamb want to cross the stone bridge you may come"
I followed the stone bridge and made it grass, but the black fox didn't crossed it, he said "This side is not for me, keep your way we may see each other again someday"
I kept walking and finally found the moon, but for some reason it was broken"

And yes, this thing wears a meaning.
At the start i only wanted to put all my characters together but when i was coloring it, i couldn't help myself.
This is Flafe's sanity, Yoru represents logic, Mirai reality and Saigo her fantasies.
What happened there?, well it's simple, the Crown and magic are her mental illness, the stone and darkness is sadness and pain, so her illnesses made everything sweeter and happier, at that moment she still was rather logic, but then she had to chose between reality and fantasy "You will get lost and never find your way back" if she kept walking that way her illness would become stronger and so, her logic would disappear, the broken moon was the result of all that, which is the conclusion and her sanity ^^