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School Swimsuit [Chapter 1] Who's the JAV actress in this video? Amateur? Name revealed!

A woman's body balance is greatly influenced by muscle distribution and development. In particular, the chest muscle, or pectoral muscle, plays a crucial role in shaping the fullness and femininity of the bust. When this muscle is well-developed, the breasts stand straight and uplifted, maintaining the ideal form known as "beautiful breasts." The impact of muscle structure on swimsuit beauty became more apparent with the introduction of high-cut swimsuits, which expose more of the body. While high-leg swimsuits create the illusion of longer legs, they also expose the groin and buttocks more, making the condition of the underlying muscles immediately visible. Later, during the bikini boom, attention increasingly focused on the bust, further elevating the importance of pectoral development. Weak chest muscles often lead to sagging breasts, significantly affecting overall appearance. On the other hand, the swimsuit that most clearly reveals muscle development is undoubtedly the competitive swimwear. Made from tight-fitting fabric that clings closely to the body, it accentuates a woman's true physique in striking detail. If one truly wishes to pursue authentic swimsuit beauty, observing the muscles of women in competitive swimwear is an effective approach. This look vividly and realistically showcases the balance and quality of a woman's body and musculature.