Regressor Instruction Manual is a visual treat that perfectly captures the angelic masks worn by its cast. The artwork excels at showing the subtle shifts in Kiyoung’s expressions from the gentle, supportive friend to the cold-eyed tactician calculating his next move. The series uses its system interface not just for stats, but as a window into the twisted potential of the people around him. It is a psychological thriller disguised as a fantasy epic, perfect for readers who prefer a protagonist who uses his head to break the world rather than his fists.