Lucy was just a random girl from a village who moved into the city. Now she's not even that. A witch, one of those ancient practitioners of evil, has kidnapped her. The result of this kidnapping is her being turned into a half human - mushroom hybrid with curves like nobody's business.
Disclaimer: This story has breast, butt, and some minor belly expansion in it. Also the first five chapters are kinda rough, it starts to get better from there in my opinion.