1girl, japanese woman, 21 years old, soft round egg-shaped face, small chin, shoulder-length dark brown hair with soft bangs falling to the left, warm brown eyes with clear double eyelids and long eyelashes, clear milky skin with light blush, large breasts, wide hips, toned female, narrow waist, completely nude, breasts and pussy fully exposed, nipples and vulva visible, lying on back, legs spread, cowgirl position, girl on top, straddling, hips moving side to side, pov, 1boy, focus, pov hands, hand holding penis, penis inserted in pussy, vaginal penetration from below, looking at viewer, eyes closed, biting lips, suppressed moan, at a swimming pool locker room, 1:1 square, masterpiece, best quality, 8k, hyper-realistic, photography, film grain, natural shadows, soft light leaks, natural light bokeh, topless, bare chest, breasts fully exposed, nipples visible, bottomless, bare lower body, pussy fully exposed, vulva visible, solo focus, medium shot waist-up