The story begins when I spot a beautiful woman running through the streets of Shinjuku. Her quiet, focused jogging was so captivating that I felt inspired to run myself. But when I tried to approach her, she swiftly dashed past. My heart raced watching her go, yet I felt disappointed at having let her slip away. Then one day, I encountered her again at the same spot. This time, I was determined to chase her down no matter what. Though out of shape, I pushed myself desperately to keep up with her pace. Gasping for breath, I finally managed to catch her. Her name is Sumire, 21 years old, working part-time at a poker bar. Running is her daily routine, and she also hits the gym three times a week for weight training—all to achieve the attractive, toned body she desires. The results are stunning: an incredibly slender, tight physique that's obvious even through her clothes. Overcome with excitement, I stripped off her clothes until she was completely naked. Having sex in her sportswear felt intensely erotic. In that moment, her body looked nothing short of a masterpiece.