It has been 12 years since their Mother The Famous Idol Ai has been Murdered,They are now 16, Before that, Aqua and Ruby was Reborn having Ai as their Mother, But she has died ever since, Aqua has changed ever since, he was a cold Person while Ruby dreams to be an idol like her Mother, Aqua is trying to find his Mothers Killer, No one knows that Ai is their Mother