Regressor instructional manual summary: You are reading Regressor instructional manual manga, one of the most popular manga covering in Manhwa genres, written by 흙수저, 독점 at MangaBuddy, a top manga site to offering for free. Regressor instructional manual has 143 translated chapters and translations of other chapters are in progress. Lets enjoy. If you want to get the updates about latest chapters, lets create an account and add Regressor instructional manual to your bookmark. He was suddenly summoned to another world one day.Monsters poured out, a huge disaster incoming.His ability the lowest.[Player's level is low][Your level is hopeless]It doesn't matter whether you're the chosen warrior, a talented wizard, or someone who travelled back in time. One must do everything they can,in order to survive.The Regressor's Instruction Manual."It doesn't matter if I'm trash." Is there anyone who wouldn't do anything they could to survive?