Regressor Instruction Manual

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? Regressor instructional manual / How to Use a Returner / 회귀자 사용설명서 / 回帰者の取扱説明書 / 当反派拥有了全知属性