Regressor Instruction Manual / 회귀자 사용설명서 / Hoegwija Sayongseolmyeongseo / How to Use a Returner / Manuel de comment bien utiliser un régresseur temporel / Como Usar um Regressor

Regressor Instruction Manual is an absolute masterpiece of the "Isekai" and "Psychological Strategy" genres, universally celebrated across the global webtoon community for its uniquely dark humor, intense mind games, and a protagonist who completely flips the traditional heroic archetype on its head. This manhwa has captured a massive international audience by doing the unthinkable: instead of making the main character an overpowered, righteous regressor, it places him in the shoes of a completely talentless, weak scavenger who survives by manipulating, gaslighting, and emotionally bonding with the actual regressor. It stands as a definitive "Intellectual Thriller," turning human trauma and dependency into the ultimate weapon for survival.

The story follows Lee Kiyoung, an ordinary man who is suddenly summoned alongside thousands of others into a brutal, game-like survival dimension known as the Continent. Upon checking his status window, Kiyoung discovers a horrifying reality: his talent stats are the absolute lowest trash tier, and he has no unique combat skills. However, he possesses a unique active eye skill: Mind's Eye, which allows him to view the detailed status windows, talents, and hidden secrets of other people. Using this ability, he locates Kim Hyunsung, a man whose hidden status reveals a shocking title—The Regressor who has returned from a failed future timeline. Instantly realizing that Hyunsung is the literal "chosen one" destined to save the world, Kiyoung crafts a flawless, deeply calculated plan to act as the regressor's fiercely loyal, self-sacrificing, and pure-hearted best friend. Stepping into the light as the ultimate tactical advisor, Kiyoung begins a ruthless, shadow campaign to gaslight his way to the apex of the imperial hierarchy, using the world's strongest hero as his personal shield.

Genres: Action, Comedy, Fantasy, Psychological, System, Shonen/Seinen