Read manhwa Regressor Instruction Manual online in English. Also known as How to Use a Returner and RIM. When Lee Kiyoung is suddenly summoned to a deadly, game-like fantasy world, he quickly realizes he is completely doomed. Unlike typical heroes gifted with overwhelming power, his base stats are the lowest possible, and his magical aptitude is practically nonexistent. However, he possesses one extraordinary survival tool: an ability that allows him to read the hidden stats, talents, and classes of everyone around him.

Using this unique sight, Kiyoung spots Kim Hyunsung, an impossibly strong warrior whose status window reveals he has traveled back in time to prevent a future apocalypse. Knowing he cannot survive the brutal monsters and shifting alliances of this new reality on his own, Kiyoung decides his best strategy is to become absolutely indispensable to this overpowered time traveler. Relying on manipulation, sweet talk, and ruthless cunning, the physically weak tactician builds a web of fiercely loyal allies, exploiting their talents to clear dungeons and conquer political rivals while hiding his true, selfish nature.

This series may appeal to readers who enjoy dark comedy, manipulative protagonists, and apocalyptic fantasy stories.