From the Start of the Apocalypse, I Swapped Souls with the Demon Saintess

Jiang Che felt like the unluckiest person alive. All he had done was pick up a little mirror at an antiques market. Yet somehow, it made him transmigrate to a perilous post-apocalyptic world. Most importantly of all, every so often he could swap souls with a Saintess of the Demonic Path. As Jiang Xiao Rou watched the reflection slowly move a big pig's trotter toward her ample chest, she let out a piercing scream. Jiang Che!