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Sports manufacturer FALENO TUBE FIT has finally launched an internal system for on-site testing of the durability of new competitive swimsuits! The test subjects are new office ladies. While wearing competitive swimsuits underneath their clothes and going about their daily work, a senior employee unexpectedly applies oil, inserts, and tests the piston pressure resistance. They are measured by being thrust through their swimsuits! They become wet and see-through, and are penetrated all the way to the inside! The time measurement continues even after they climax! The evaluation is based on the degree of penetration, transparency, and how well they orgasm! This is the first mission for these newly graduated office ladies, who are putting the company's future on the line with their competitive swimsuits and their bodies!