Starting filming in Shinjuku at night! Pretending to be staff from a "body transformation variety show" and approaching people, we managed to catch several ladies. One of them, dressed stylishly in a sporty jersey, seemed to be coming from the gym. She herself appeared to be an instructor, a perfect fit! In a hotel room, she taught flexibility exercises, and her appearance was quite erotic! Wearing only a sports bra (?), perhaps because she is a personal trainer and mostly deals with women, she seems to teach people in this attire regularly... As she instructed me in such an erotic outfit, I couldn't help but get aroused... Wearing tight tights, the state of my arousal was obvious! As she taught me how to do a bridge, my erection grew proportionally to my improved flexibility. The lady was very interested in my bulging crotch. Her hand reached out, took hold, and then, succumbing to curiosity, we proceeded to... A work that captures the miraculous beauty of a firm, plump butt, mixed with a unique softness characteristic of women, leaving one's eyes glued to it!