An experiment documenting the changes in odor and soiling that occur when underwear is worn continuously for over 15 hours without changing. Two close female classmates collaborate, observing the condition of their underwear while engaging in various activities at school and in a hotel. They explore a lesbian-like relationship, including scenes of urination and defecation in the toilet, and ultimately conduct a detailed examination of the accumulated filth. This work realistically portrays a strange experiment embedded in daily routine, capturing feelings of discomfort and unhygienic conditions with striking authenticity.