An original story by Sing-Shong, the acclaimed author of Omniscient Reader's Viewpoint. This is the chronicle of the man who refused to regress when the rest of the world decided to return to the past.

Humanity was suddenly summoned to become "Walkers," tasked with climbing a mysterious tower to save their world. However, upon reaching the 77th Floor, the "Stone of Regression" was discovered. With this artifact, Walkers could abandon the present and "return" to a safer past. One by one, everyone left...

Thus was born "Carpe Diem," humanity's last hope—a group formed by those who refused to abandon their current reality. But time and despair are unforgiving. After years of struggle, the last Walker has finally reached the 100th Floor. Alone, at the peak of everything, he no longer knows what to believe.