Humanity had to survive in an alien world within a strict one-year time limit. To an unknown and dangerous world, they were offered skills.

One could pick a set of skills and end up with an indestructible body.
Another selected leisure-based skills and still rose to a high rank.
Some possessed S-rank skills, yet fell to veteran crafters who mastered the basics.
And there was one who picked ten skills... and somehow mastered a hundred.

Countless events unfolded, giving light and darkness—such as human alien forms, evolution tree, skill combinations, jobs based on alien customs, terrifying aliens with unknown abilities… including bosses that seemed unbeatable, and battles in a city that transformed into rubber, or city where gravity dropped to zero.

But one light shone brighter than the rest. The appearance of a person who saved billions of lives, overcame countless adversities, and even defeated the unbeatable. He became a legend—earning the title, “The Playful One.”