Iya na Kao Sarenagara Opantsu Misete Moraitai: Yo wa Pantsu ga Mitai zo

Iya na Kao Sarenagara Opantsu Misete Moraitai, authored by Shimahara, originated as a self-published doujin series that gained significant traction online through the artist's Twitter and Pixiv accounts. The series is defined by its recurring visual motif of characters expressing overt disdain or irritation while revealing their undergarments to the viewer, a concept that leans heavily into specific niche tropes of Japanese subculture.

The transition of this work into published volumes and later an anime adaptation reflects its success within the subgenre of observational manga. Shimahara's art style is characterized by expressive, albeit stylized, character designs that emphasize the contrast between the characters' hostile expressions and the subject matter of the illustrations. While the series has been critiqued for its repetitive nature, it maintains a dedicated following among enthusiasts of character-focused, trope-heavy art collections.