Vampires, werewolves, and other supernatural beasts are thought to be fiction, but that was not true. It may look like humans are the only ones in the world, but that's because the other races have hidden themselves well, adapting to the changes made by the humans. The said beasts enter academies that teach them on how to live with the humans, and one of those is Sky Academy.

On the new school year on 2016, Sky Academy invited a human to the academy, Rain Leonhart, a sixteen year old girl who was poor and doesn't have a place to return to.

Rain was to make the other races accustomed to humans, like making vampires stop their urge from draining their blood or making the werewolves stop from seeing them as food, but it's not that easy.

With different races that see her as someone inferior, Rain's life was always at risk, or that's what they think. Little did everyone know that Rain was far more special than them.

She's one of the three remaining heroes in the world, and she's strong enough to eradicate the whole academy.