While working as an office lady, Makoto Yonekura struggles to endure intense bowel pressure due to her strong sense of duty. In the middle of answering business calls and urgently copying documents, she finally reaches her limit. In the quiet office, she accidentally defecates herself. In this compromised state, she heads toward a meeting room to deliver documents. Dressed in a typical OL uniform, she finds herself alone in a room with only a desk, eerily silent. Suddenly, the door slams shut, engulfing her in shock and fear. The doorknob won't turn—locked from the outside. Without warning, someone grabs her from behind, covering her face, thrusting her into a moment of terror.