This story originally ran on Tieba as a Goblin Slayer fanfic. But after I'd written a hundred thousand words, not a single character from the original Goblin Slayer world had appeared, nor had the story ever entered its setting. Aside from the goblins, it had practically nothing to do with Goblin Slayer. That's just how I write: the plot always gets away from me. The plan was for the protagonist to transmigrate, kill some goblins, and then head to Goblin Slayer's town. But then I thought he was too weak and needed somewhere to level up, and before long I was just making things up as I went. So I changed the title. Breaking free of the Goblin Slayer setting gives me more freedom. Just think of it as a fantasy anime mashup.
The story of a shut-in who transmigrates into the world of Goblin Slayer as an Undead. He starts with nothing, no System, no cheat abilities (apart from being Undead), and has a heroine of his own. He won't steal women from the original characters.
I was inspired by a "Dark Souls x Goblin Slayer" fanfic. Its protagonist was an Ashen One who had already linked the fire, so he started at a very high level. In a gritty series like Goblin Slayer, that meant he steamrolled everything. It was fun at first, but got boring later. Since I was left wanting more, I decided to write my own: a hard-mode story about someone starting with nothing and struggling to survive through sheer effort.
