I Kill the BOSS Alone

10 Years ago, the door connecting the dungeon of another dimension to the world was opened. Various treasures appeared along with monsters, and explorers with extraordinary abilities also appeared one after another. Life in the entire world also changed dramatically. High school student Su Junxiu, in order to save her sick parents and bring hope to her younger sister who doesn't know how to survive, decided to go into the dungeon to hunt for treasure. He encountered a desperate situation in the dungeon, but unexpectedly obtained a BOSS-killing system. The system gave him a gift package for newbies at the beginning - "Full Healing Potion" and "Backlash Gun". Su Junxiu entered the dungeon again, killed the BOSS monster, and obtained the "Essence of Vitality" potion that can transform physical fitness. Kill the BOSS monster and obtain the "mad blood" that can instantly increase your strength. Kill the BOSS monster and obtain the "Dragon-Slaying Sword" that can accompany the owner's growth. … With the support of the plug-in system, the little man Su Junxiu rose rapidly. From then on, the arrogant BOSS-level monsters began to face their nightmares.