This world has monsters and fierce beasts running rampant, and everyone must become a brave person to drive out the monsters. Su Zhou came to this world and became a gunman, accidentally triggering a "mysterious task" where his strength becomes as powerful as the number of bullets he fires. Because he suffers from a firepower shortage phobia, Su Zhou's small goal is set to fire one billion bullets! To complete this task, Su Zhou was held back in school for a full five years. After completing his task and activating the transcendent profession Jiuxiao Gunman, he discovers that all his skills are awakening skills!