Earth has been infested with monsters or Xenos. Fortunately, humans have their own way to fight back as they received arcane magic to fend off these monsters. The world has chosen Seven Blades as their warriors, and adventurers are fighting alongside them. Rinku, an oddity, who has the power of a Glitch System-powerful enough to combine skills, create a unique spell, and even possess out of this world artifacts, will soon shake the world's power as he kills and levels up one monster at a time. Who would've thought that the Glitch is the most powerful system of the world? Maybe... it's been bugged!