Something about this world

In a world where everyone wears masks resembling their country, Mika, a teenage girl, is on of the odd ones put. She's Last's Person. Though everyone says that the people like her don't need to unite, otherwise the world would end, she tries to figure out why and how will it end. After she does figure it out, things start to change, her relationships deteriorating and her sanity falling.

How will things turn out in the end for her and the person she left behind?

Note: Chapters will be uploaded every whenever because school😐