Introduction: Lee Se-Hoon, the blacksmith of humanity鈥檚 last desperate united force, fought against the demons until the very end. However, the result was mutual destruction, with the world coming to an end. The moment he took his own life over that futile conclusion鈥斺€溾€?hat is this?鈥滺e had regressed to his days as a candidate at the hero training institution, Babel Academy. Having obtained a second chance, he swore to use anything as material to gain victory this time. Anything at all!...