The project originated as a popular doujin illustration series and has since expanded into multiple anime seasons, manga, and light novels. A third series, titled (Returns), is scheduled for an April 2026 premiere.

The series, often abbreviated as IyaPan , focuses on a first-person perspective (POV) where various female characters are asked by the protagonist to show their underwear. True to the title, they comply while looking at the viewer with expressions of intense disgust or contempt. Season 2 Details

a story of how a producer stole 5 million yen and ran away with it

The production of the second season was also notable for a behind-the-scenes scandal where the original producer allegedly absconded with production funds, forcing the director and studio to pay staff out of their own pockets to finish the project.