Demon Lord Against the Server

The year was 2177, and the VRMMORPG Dawn was finally released. Everyone was excited to play it, including Edwin, who planned to play it with his college friends. All of his plans got destroyed when he found an old book in the beginners' village. [Do you want to change your class to Demon Lord] [Yes] [Every player inside Dawn now will be your enemy] "Wait, WHAT?????"