A film centered around the crotch lines of girls, showcasing the outlines formed by various garments such as panties, swimsuits, leotards, and gym uniforms. As the first installment in this series, it clearly highlights the girls' vulva shapes through tight clothing, making it irresistible for fans who appreciate the beauty of crotch lines. The added appeal of imagining the shape of the crotch through fabric makes this a must-watch for enthusiasts of crotch line aesthetics.