My Sister's Adventure in the Dungeon, the Identity of My City Lord Is Exposed

The abyss is resurrected and is about to erode Blue Star. Lin Xuan is bound to the [Dungeon System]. The bigger the city is, the more monsters it collects, and the stronger it becomes. From then on, he was a college student during the day and the dungeon master at night. The Lord of the Abyss and billions of monsters surrendered to his command one after another. With the power of one person, suppress the entire abyss! Humanity knows nothing about this. Until the Lord of the Abyss initially recovered and opened the passage between the abyss and the surface. For a time, the humans on Blue Star turned into adventurers and explored the dungeon. Lin Xi, Lin Xuan's sister, also embarked on an adventure during the summer vacation after the college entrance examination. Little did she know that this journey would be something she would never forget. "This crystal bracelet has a forbidden light spell solidified in it - Holy Light Elegy?" "I don't know, the bracelet was an eighteenth birthday gift from my brother!" "Is this great sword the ultimate artifact?" "Impossible? These are the cosplay props I took from my brother's room!" "Eh? Why are you monsters lining up for me to kill!" "What does it mean to help me reach the full level by following my brother's orders?" Blue Star Human: "Who is her brother?!" Lord of the Abyss: "Damn Lin Xuan, you are too lazy to take action, so you are training your sister to deal with me, right?" Lin Xuan: "You want to fight me?" Lord of the Abyss: "..."