A film centered around a young lady attending a prestigious private affiliated school. Known for its elegant atmosphere, the school allows students to freely choose their skirt designs, creating a consistently cute yet refined image. Driven by intellectual curiosity about what kind of underwear these refined schoolgirls normally wear, the project begins with covert investigations under their skirts. The crew discovers K-chan, whose sailor uniform is tightly stretched across her chest, sparking fascination with her adorable face and curiosity about her breasts. The ultimate goal is to grope her tits, but first, they flip the bag camera upside down, smoothly sliding it beneath her skirt to reveal a pure white panty worn without any layers underneath.