The Demon King's Dorm Is Full of Magical Girls?!

In less than a year as an evil officer, Lin Xiaoli thought she'd been handed the villain's role in a magical-girl game. She was an all-powerful Demon King, and the pitiful magical girls were toys in her hands... What do you mean the roommate I've known all this time is a magical girl? What do you mean they want to play two-player Gold Miner in the dorm, and Lin Xiaoli is the one being mined?! A massive crisis! Can the Demon King turn the tables?