Doomsday: I Can Form Contracts with Anything

[Transmigration] + [System] + [Apocalyptic Survival]

After transmigrating, Lin Xiao was just about to get intimate with his girlfriend when he discovered he'd activated a System. It should have been a double celebration from the start, but instead the apocalypse arrived. With no other choice, he killed his girlfriend with his own hands and began a life of contracting female zombies to sweep through the apocalypse.