1girl, 1man, japanese woman, 21 years old, large breasts, wide hips, toned female, narrow waist, soft round egg-shaped face, small chin, shoulder-length dark brown hair flowing to the left with soft bangs, warm brown eyes, clear double eyelids, long eyelashes, clear milky skin, light blush, completely nude, breasts and pussy fully exposed, nipples and vulva visible, lying on back, legs spread, hands on her thighs, looking at viewer, 1man pov, 1boy, focus, pov hands, fingering, fingers in pussy, finger penetration, fingers moving in and out, finger fucking, pov crotch, pov fingers, at a swimming pool changing 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