The apocalypse is coming, and in the ruins where monsters are rampant, others are desperately hoarding supplies and hugging each other, but I am just picking up pieces in the ruins. The broken cards in the trash heap are worthless in the eyes of others, but I discovered their secrets - every time I collect one, I can unlock a limited-time magic skill! From then on, the zombies became unparalleled, and the siege of alien beasts was defeated with one sword. When the hidden truth was revealed, there was actually a game behind this catastrophe, and I, who was picking up the pieces, unknowingly became the only player.
