Our Hero in Fusionfalls

Tama, an ordinary schoolgirl who doesn't want to be part of anything due to her annoyance, even if she's been sent to the future to fight the fusions of where it happen! Telling her that she was chosen to be the hero who can actually stop the invasion, stop the evil and save the world as a hero. Will she take that role or let the human race to be destroyed forever? Which one is it?