Transformation is a broad trope tag covering any story in which a character's body physically changes over the course of the plot, whether through magic, science, curses, or supernatural means, and can overlap with more specific tags like gender change or breast expansion without being limited to either. The appeal often centers on the process of change itself as much as the result. Transformation hentai manga and doujinshi spanning many types of physical change are available on Top Hentai.
