The Isekai Fantasy is a Scam: Blame the Incompetent Goddess of Death for Crashing My Reincarnation System

The Isekai Fantasy is a Scam. Murdered in his world, Allen’s soul fused with a software he coded. Dropped into the Underworld due to Hella's error, he wakes up in a terrifying 5-star graveyard where what is dead does not stay dead. With a broken system that needs repairs, he can’t be a hero. To survive and reverse-engineer the laws of magic, Allen must ally with a princess, a goddess, a banshee, and an elf to unearth a world buried for centuries beneath the Empire of Death.