The Regressor Protects Only Me is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Humanity was designated as an invasive species of the universe. To reduce humanity's numbers, the universe's administrators initiate a survival game. Jin Jaehee, having returned from the final stage of the game, reaches one clear conclusion: "Kang Sion, only he can lead us to victory in this game." Kang Sion, a genius with an unparalleled mind. Jin Jaehee, a regressor who lost in the survival game and returned to the past. With the regressor as his ally, Kang Sion begins to unravel the death game with unprecedented skill