My girlfriend, who was drunk and lost her mind, suddenly said strange things."Su-hyeok, I've regressed.""Regressed?""Yes, I've come back in time.""Are you crazy?""You are the only hope for humanity."And then I was taken to the tower… But it doesn't matter!Regressor? Tower? Trials? Whatever it is, It doesn't matter but what I know is I'll conquer this goddamn tower!