This special production carefully explains the proper use of emergency and portable toilets from a uniquely female perspective, offering practical knowledge for emergencies or disasters while also allowing viewers to enjoy the sensations of shame and discomfort experienced throughout the process. The fourth installment continues the focus on female-performed excretion demonstrations, now enhanced with an upgraded four-camera setup for greater intensity. Packed with content that blends practicality and eroticism, it captures detailed close-ups of anal movements during defecation, cleanup procedures, wiping techniques, and more. New highlights include women urinating standing up at male urinals, various female pissing methods, loud farting during excretion, and genuine reactions to such moments. Seven performers each demonstrate real excretions, showcasing authentic and unfiltered scenes. Merging education with eroticism, this work stands out as a compelling experience where seemingly uncomfortable content delivers both practical value and sensual pleasure.