Filming begins in the night of Shinjuku! Pretending to be staff for a 'body modification variety show,' we start approaching women. We managed to catch several groups, and one sister who was stylishly dressed in sportswear seemed to be coming back from the gym. She herself appears to be an instructor, making her the perfect fit! In a hotel room, she teaches us stretching exercises, but her form is so erotic! She's wearing just a sports bra (?) on top! As a personal trainer who mostly deals with women, she apparently teaches in this outfit all the time… Watching such an erotic sister give instructions makes it hard to control my lower half… She’s wearing tight leggings, making the bulge completely obvious! While she was teaching us the bridge pose, my penis started to curve upwards in proportion to her arched back. The sister became fascinated with my swollen crotch. Her hand reached out, took it into her mouth, and driven by curiosity, we ended up having sex… This work is a masterpiece featuring an incredible ass that combines firmness and elasticity with the unique softness of a woman!
