Doomsday Showdown: I Have a House of Cards

[Apocalypse] + [System] + [Cards] + [Multiple Heroines]

Three years ago, a virus leak at Shabak Biotech, a subsidiary of the Tianma Star Alliance, triggered a zombie crisis on the planet Kazilan. Seventy percent of humanity, along with the plants and animals, was wiped out.

Brainleaf AI, also a subsidiary of the Tianma Star Alliance, is an enterprise affiliated with Kazilan University. It developed the survival game "Fifth Space," a parallel world suited to the survival of humanity after the apocalypse and those awakened to supernatural abilities.

Due to their conflicting views on technology, Shabak and Brainleaf became rivals in the battle to establish a new order on Kazilan.

Gao Bingye, a first-year computer programming student at Kazilan University, awakens his psychic powers and a card system through fragments of his surviving memories and specialized knowledge. He is soon recruited by Brainleaf's Special Affairs Division, becoming an agent tasked with handling abnormal incidents in the post-apocalyptic world.

Before long, special affairs departments from countries such as the Beautiful Nation, Long Nation, Su Russia, and Tokyo, as well as all kinds of imaginative, wildly inventive high-tech groups and media personalities, also make their appearances, establishing their own new nations and extraordinary factions.

One covert struggle after another over the fate of humanity quietly begins on Kazilan.