The protagonist awakens from cryosleep, having been the sole individual deep within a nuclear shelter.

Upon awakening, they find themselves 100 years in the future, in a world that has transformed into an otherworldly realm.

Even the nuclear shelter where the protagonist resides has been affected, turning into a dungeon.

Through a mysterious transmission, they download a program called the "Adept System." Using this program, they can absorb "magicules" and level up.

It seems magicules can be obtained by defeating monsters.

Utilizing the remaining security systems within the nuclear shelter to defeat monsters, the protagonist attempts to escape.

*Currently on hiatus.

Work will resume once the mid-length story is written and the plot for Chapter 3 is finalized.