This work features a mysterious beauty with a large hat hiding her eyes as the protagonist. Initially, she appears expressionless, exuding an iron mask-like aura, but under persistent stimulation, her body gradually begins to react. Particularly when her weak spot, the buttocks, is struck, her previous composure collapses instantly, revealing a sexy true face, a gap that is irresistible. I personally watched it and found the moment of transition from expressionless to intense expression exhilarating, akin to a reversal in a sports match. The process from the body's quiet continuous reactions to the eventual emotional explosion is meticulously depicted, keeping viewers engaged. The contrast between the mystery of the eyes hidden by the hat and the exposed eroticism forms the core of the work, making it enjoyable not just as an AV but also as a psychological drama. Overall, the gradual release of suppressed emotions resembles a shift from endurance to attack in sports, offering great viewing value. In my opinion, works that skillfully utilize such gaps are worth keeping an eye on in the future.