I remember the girls going to an all-girl school together. When it's time to fight they "ask" something/-one for permission(?) to activate their power.

Each color (blue, black, red, green) is different with different powers. Each girl gets an earring to "seal" the pact with whoever to use the power.

The black power is "evil" and I remember the girl getting it by bonding(?) with some young boy who is a typical a**hole.

I can't remember what or who they were fighting, but they were fighting something.

Their eyes say something like "blu rose lvl restriction lifted".