Conquering the Tower Even Regressors Couldn't

One drunken night, my friend blurted out something absurd. “Su-Hyeok, I’ve regressed." “Regressed?" “Yeah, I’ve returned to the past." “Are you out of your mind?" “You’re humanity’s only hope." Then, I was dragged into the tower for real... but who cares? Regressor? Tower? Trials? What are those supposed to be? An overwhelming talent is about to crush everything in its path!