Apocalyptic Romance Variety

A large-scale real-life love variety show in the apocalyptic era. 4 Pairs of men and 8 people stayed in a strange train. This train left the underwater world and will go from the frozen land to the desert sea and then return to the underwater world again. Not satisfied with the opposite sex on the train? You can leave this train and wait for the next train to arrive until you find your soul mate. After successfully matching, you can borrow an RV and travel around the vast world on your own. If it doesn't feel right, get back on a new train and find a new partner.