One had been friends with Three for quite a while now, but she always felt alone, with nobody to talk to. She recently discovered a meteor that fell from the sky which gives special powers, so she showed Three the rock too. Both she and Three teamed up to learn more about the rock, after a while, they got a bit sleepy and went to bed.
☆THE NEXT DAY☆
One wakes up in the equation playground, but finds no one there. She decides to go to the meteor but finds everyone there. Four, X, Two, Five, Nine, etc. She is clearly mad since the rock was supposed to be a secret. Everyone quickly shelters under the tree due to heavy weather... except for One, who breaks the tree down with her newfound powers, and everyone manages to get out. One confronts Three, clearly pissed. So pissed in fact that she uses her powers to kill Three. Everyone is mortified at the sight of Three being shattered into a million pieces. One quickly gets up and realises what she's done, her eyes tearing up slightly as she yells...
"N-no, it was an accident! I can fix her!"
No one seems to believe One as they all walk away