Bury Me in a Coffin, and the King of Hell Awakens

I was sealed in a coffin and buried alive. My enemies have no idea that every severed tendon hides a Soul-Locking Nail. Seven days later, I climb out of the coffin and become the owner of a funeral shop, taking on jobs for the dead, until one day, blood-red words appear in a ledger with no writing: “The River God is taking a bride. The bride is the girl who cooked noodles for you yesterday.”