Parallel World- an Apocalypse Hero

One day, Jonathan wakes up and finds himself transported to a post-apocalyptic world, where he gains a system called \"Parallel World.\" This system not only gives him an advantage in fighting zombies but also helps him continuously level up by battling monsters.

The first challenge presented by the system is a pre-20th century American post-apocalyptic world. In this world, extravagant parties are in full swing, and the main host—a powerful figure—suddenly disappears, leaving behind a group of international supermodels, socialites, and Hollywood actors.

At the same time, the second world is a post-apocalyptic version of this world set several years in the future. The female protagonists of both worlds share a close connection. As long as one world’s conditions improve, it will significantly reduce the difficulty of \"training\" in the other world...