Actress Suzu, known for her strong anal tolerance, embarks on a four-day documented journey to achieve her long-held goal of mastering anal fisting. On the second day, the film checks the progress made from the previous day's anal stretching. Starting with fingers, she gradually increases from four to five, then lightly presses in a fist—though it still won't fully enter. The session continues with vaginal vibrators and an extra-large dildo, intensifying the hardcore stretching process. Her real-time reactions and physical changes throughout the procedure are captured with raw, immersive realism.