The World After the Fall, 1

One day, without warning, colossal towers appear all over the world. Humanity's surprise and bewilderment soon turn to panic and terror as swarms of horrifying monsters descend upon the world to sow chaos. Humanity's only hope for survival rests with Jaehwan and his fellow Tower Walkers, who have one mission: to reach the top. Or so they thought. Jaehwan begins to sense that things are not what they seem, and he must trust no one but himself. With webs of deceit threatening at every turn, can Jaehwan reach the 100th Floor and finally uncover the truth?