Alterverse [2013 AMV]

Story: Alterverse is set around a young girl who happens to come upon a special ability which allows her to program fantasy into reality. After compiling a long and complicated string of code, she had attempted to bring out her true utopia into the physical world. However, unfortunately for her, she ran into a nasty error which corrupted the entire application and caused it to decay both her fantasy world AND the world we live in.

Luckily, through the help of her "Correctors", she was able to buy enough time to save this world at the cost of losing her fantasy realm known as "Alterverse". At the cost of all three of her "Correctors" dying and her erasing every last bit of Alterverse, our world was spared and the girl in question was able to return to her normal life once again.