20-year-old office lady Arisu Higashino suddenly suffers severe abdominal pain. By chance, her acquaintance Dr. Sakata arrives and instructs her to endure the intense urge to defecate while heading to his clinic. However, upon arrival, Dr. Sakata reveals himself as a scat fetishist and aims a video camera at Arisu to record her defecating. Panicking, she tries to escape but accidentally defecates on the stairs, giving him leverage over her. Later, fate brings her back to perform another public defecation in front of him. Returning once again is Sayaka Ichinose, who suffers from a weak stomach and presents a documented episode of diarrhea incontinence. The two women, caught in unexpected circumstances, face a surprising turn of events.