Read Regressor Instruction Manual is a fantasy manhwa in English where survivors battle terrifying monsters. The main character Giyoung possesses a unique status window ability to read hidden talent levels. He discovers a dangerous secret regarding his powerful companion Hyunsung who returned from a ruined future. To survive this brutal game system, Giyoung must exploit strategic information and manipulate stronger allies. Ruthless enemy factions and boss creatures constantly threaten their progress through the shifting tutorial trials. Giyoung is scheming behind the scenes while controlling powerful warriors.