I Survived the Wasteland and Accidentally Became a Parasite

In the wasteland left by the Great Cataclysm, the surface is uninhabitable, and humanity huddles in underground bases.

Li Cha, a transmigrator, arrives in this world. His Host is a patient living in the base's psychiatric hospital, but he possesses an awakened ability called Parasite, which lets him briefly inhabit other people's bodies.

Through parasitism, he discovers that the base is not humanity's only refuge. Large numbers of people survived on the surface, including not only ordinary folk barely clinging to life, but also hordes of mutants and Awakened with strange and dangerous abilities.

To break free of the base, Li Cha and his fellow patients try all kinds of outrageous schemes to escape, only to get caught up in a long-standing feud between the surface and underground factions.