A century ago, the world changed.

In seven places, on seven continents, weird energy washed over the world.

Half of the population were blessed with superhuman physicality and the ability to use the lifeforce of the world; mana.

Those who could use mana are called Streia and those who choose to protect normal people for a living as a Streia are called Magi.

The event that caused this was called the Grand Impact.

However, not everything about the Grand Impact was good. Streia were born but so were Imperi.

An unknown species who now inhabit the world intending to cull humanity. They come in all different shapes and forms, that are not human-like.

It is up to the Streia to save the world from the hands of the Imperi.