Thunderclap Comet

80 years ago, monsters called "xenobeasts" began emerging from portals known as the "gates". This was the start of a period of time known as the "advent". Soon after, people began awakening to superhuman powers, and fighting against the xenobeasts. 80 years later, and the fight continues. But not all is as it seems.. this story revolves around one girl, who, unbeknownst to her, is about to make history.