My Roleplay System Novel

Lake discovers a mysterious Roleplay System just weeks before his Martial Course Entrance Exam. The system appears as a holographic interface while he dozes in class, offering him the chance to select and embody different roles. Initially dismissing it as a dream, Lake casually accepts the prompt. He's then presented with an overwhelming array of role options—Martial Saint, Heavenly Sage, Harem King, Slaughterer, and countless others that fill his entire field of vision. Feeling dizzy from the sheer number of choices, Lake quickly scans the list and selects the role that captures his interest most: Master of Fate. With this decision, his journey with the Roleplay System begins, though he has yet to understand what consequences this choice will bring to his life and upcoming examination.